21451920

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{113}}^2$

素因数の和:249

約数の個数: 120

約数和(自身を含む): 76679616

約数和(自身を除く): 55227696

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 113, 120, 140, 168, 210, 226, 240, 280, 336, 339, 420, 452, 560, 565, 678, 791, 840, 904, 1130, 1356, 1582, 1680, 1695, 1808, 2260, 2373, 2712, 3164, 3390, 3955, 4520, 4746, 5424, 6328, 6780, 7910, 9040, 9492, 11865, 12656, 12769, 13560, 15820, 18984, 23730, 25538, 27120, 31640, 37968, 38307, 47460, 51076, 63280, 63845, 76614, 89383, 94920, 102152, 127690, 153228, 178766, 189840, 191535, 204304, 255380, 268149, 306456, 357532, 383070, 446915, 510760, 536298, 612912, 715064, 766140, 893830, 1021520, 1072596, 1340745, 1430128, 1532280, 1787660, 2145192, 2681490, 3064560, 3575320, 4290384, 5362980, 7150640, 10725960, 21451920]

約数ペア:

[(1, 21451920), (2, 10725960), (3, 7150640), (4, 5362980), (5, 4290384), (6, 3575320), (7, 3064560), (8, 2681490), (10, 2145192), (12, 1787660), (14, 1532280), (15, 1430128), (16, 1340745), (20, 1072596), (21, 1021520), (24, 893830), (28, 766140), (30, 715064), (35, 612912), (40, 536298), (42, 510760), (48, 446915), (56, 383070), (60, 357532), (70, 306456), (80, 268149), (84, 255380), (105, 204304), (112, 191535), (113, 189840), (120, 178766), (140, 153228), (168, 127690), (210, 102152), (226, 94920), (240, 89383), (280, 76614), (336, 63845), (339, 63280), (420, 51076), (452, 47460), (560, 38307), (565, 37968), (678, 31640), (791, 27120), (840, 25538), (904, 23730), (1130, 18984), (1356, 15820), (1582, 13560), (1680, 12769), (1695, 12656), (1808, 11865), (2260, 9492), (2373, 9040), (2712, 7910), (3164, 6780), (3390, 6328), (3955, 5424), (4520, 4746)]