19981920

素因数分解:

$2^5\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{313}}^1$

素因数の和:357

約数の個数: 192

約数和(自身を含む): 75962880

約数和(自身を除く): 55980960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 19, 20, 21, 24, 28, 30, 32, 35, 38, 40, 42, 48, 56, 57, 60, 70, 76, 80, 84, 95, 96, 105, 112, 114, 120, 133, 140, 152, 160, 168, 190, 210, 224, 228, 240, 266, 280, 285, 304, 313, 336, 380, 399, 420, 456, 480, 532, 560, 570, 608, 626, 665, 672, 760, 798, 840, 912, 939, 1064, 1120, 1140, 1252, 1330, 1520, 1565, 1596, 1680, 1824, 1878, 1995, 2128, 2191, 2280, 2504, 2660, 3040, 3130, 3192, 3360, 3756, 3990, 4256, 4382, 4560, 4695, 5008, 5320, 5947, 6260, 6384, 6573, 7512, 7980, 8764, 9120, 9390, 10016, 10640, 10955, 11894, 12520, 12768, 13146, 15024, 15960, 17528, 17841, 18780, 21280, 21910, 23788, 25040, 26292, 29735, 30048, 31920, 32865, 35056, 35682, 37560, 41629, 43820, 47576, 50080, 52584, 59470, 63840, 65730, 70112, 71364, 75120, 83258, 87640, 89205, 95152, 105168, 118940, 124887, 131460, 142728, 150240, 166516, 175280, 178410, 190304, 208145, 210336, 237880, 249774, 262920, 285456, 333032, 350560, 356820, 416290, 475760, 499548, 525840, 570912, 624435, 666064, 713640, 832580, 951520, 999096, 1051680, 1248870, 1332128, 1427280, 1665160, 1998192, 2497740, 2854560, 3330320, 3996384, 4995480, 6660640, 9990960, 19981920]

約数ペア:

[(1, 19981920), (2, 9990960), (3, 6660640), (4, 4995480), (5, 3996384), (6, 3330320), (7, 2854560), (8, 2497740), (10, 1998192), (12, 1665160), (14, 1427280), (15, 1332128), (16, 1248870), (19, 1051680), (20, 999096), (21, 951520), (24, 832580), (28, 713640), (30, 666064), (32, 624435), (35, 570912), (38, 525840), (40, 499548), (42, 475760), (48, 416290), (56, 356820), (57, 350560), (60, 333032), (70, 285456), (76, 262920), (80, 249774), (84, 237880), (95, 210336), (96, 208145), (105, 190304), (112, 178410), (114, 175280), (120, 166516), (133, 150240), (140, 142728), (152, 131460), (160, 124887), (168, 118940), (190, 105168), (210, 95152), (224, 89205), (228, 87640), (240, 83258), (266, 75120), (280, 71364), (285, 70112), (304, 65730), (313, 63840), (336, 59470), (380, 52584), (399, 50080), (420, 47576), (456, 43820), (480, 41629), (532, 37560), (560, 35682), (570, 35056), (608, 32865), (626, 31920), (665, 30048), (672, 29735), (760, 26292), (798, 25040), (840, 23788), (912, 21910), (939, 21280), (1064, 18780), (1120, 17841), (1140, 17528), (1252, 15960), (1330, 15024), (1520, 13146), (1565, 12768), (1596, 12520), (1680, 11894), (1824, 10955), (1878, 10640), (1995, 10016), (2128, 9390), (2191, 9120), (2280, 8764), (2504, 7980), (2660, 7512), (3040, 6573), (3130, 6384), (3192, 6260), (3360, 5947), (3756, 5320), (3990, 5008), (4256, 4695), (4382, 4560)]