21039840

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{769}}^1$

素因数の和:809

約数の個数: 144

約数和(自身を含む): 75675600

約数和(自身を除く): 54635760

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 30, 32, 36, 38, 40, 45, 48, 57, 60, 72, 76, 80, 90, 95, 96, 114, 120, 144, 152, 160, 171, 180, 190, 228, 240, 285, 288, 304, 342, 360, 380, 456, 480, 570, 608, 684, 720, 760, 769, 855, 912, 1140, 1368, 1440, 1520, 1538, 1710, 1824, 2280, 2307, 2736, 3040, 3076, 3420, 3845, 4560, 4614, 5472, 6152, 6840, 6921, 7690, 9120, 9228, 11535, 12304, 13680, 13842, 14611, 15380, 18456, 23070, 24608, 27360, 27684, 29222, 30760, 34605, 36912, 43833, 46140, 55368, 58444, 61520, 69210, 73055, 73824, 87666, 92280, 110736, 116888, 123040, 131499, 138420, 146110, 175332, 184560, 219165, 221472, 233776, 262998, 276840, 292220, 350664, 369120, 438330, 467552, 525996, 553680, 584440, 657495, 701328, 876660, 1051992, 1107360, 1168880, 1314990, 1402656, 1753320, 2103984, 2337760, 2629980, 3506640, 4207968, 5259960, 7013280, 10519920, 21039840]

約数ペア:

[(1, 21039840), (2, 10519920), (3, 7013280), (4, 5259960), (5, 4207968), (6, 3506640), (8, 2629980), (9, 2337760), (10, 2103984), (12, 1753320), (15, 1402656), (16, 1314990), (18, 1168880), (19, 1107360), (20, 1051992), (24, 876660), (30, 701328), (32, 657495), (36, 584440), (38, 553680), (40, 525996), (45, 467552), (48, 438330), (57, 369120), (60, 350664), (72, 292220), (76, 276840), (80, 262998), (90, 233776), (95, 221472), (96, 219165), (114, 184560), (120, 175332), (144, 146110), (152, 138420), (160, 131499), (171, 123040), (180, 116888), (190, 110736), (228, 92280), (240, 87666), (285, 73824), (288, 73055), (304, 69210), (342, 61520), (360, 58444), (380, 55368), (456, 46140), (480, 43833), (570, 36912), (608, 34605), (684, 30760), (720, 29222), (760, 27684), (769, 27360), (855, 24608), (912, 23070), (1140, 18456), (1368, 15380), (1440, 14611), (1520, 13842), (1538, 13680), (1710, 12304), (1824, 11535), (2280, 9228), (2307, 9120), (2736, 7690), (3040, 6921), (3076, 6840), (3420, 6152), (3845, 5472), (4560, 4614)]