28087280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{239}}^1$

素因数の和:378

約数の個数: 80

約数和(自身を含む): 71245440

約数和(自身を除く): 43158160

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 113, 130, 208, 226, 239, 260, 452, 478, 520, 565, 904, 956, 1040, 1130, 1195, 1469, 1808, 1912, 2260, 2390, 2938, 3107, 3824, 4520, 4780, 5876, 6214, 7345, 9040, 9560, 11752, 12428, 14690, 15535, 19120, 23504, 24856, 27007, 29380, 31070, 49712, 54014, 58760, 62140, 108028, 117520, 124280, 135035, 216056, 248560, 270070, 351091, 432112, 540140, 702182, 1080280, 1404364, 1755455, 2160560, 2808728, 3510910, 5617456, 7021820, 14043640, 28087280]

約数ペア:

[(1, 28087280), (2, 14043640), (4, 7021820), (5, 5617456), (8, 3510910), (10, 2808728), (13, 2160560), (16, 1755455), (20, 1404364), (26, 1080280), (40, 702182), (52, 540140), (65, 432112), (80, 351091), (104, 270070), (113, 248560), (130, 216056), (208, 135035), (226, 124280), (239, 117520), (260, 108028), (452, 62140), (478, 58760), (520, 54014), (565, 49712), (904, 31070), (956, 29380), (1040, 27007), (1130, 24856), (1195, 23504), (1469, 19120), (1808, 15535), (1912, 14690), (2260, 12428), (2390, 11752), (2938, 9560), (3107, 9040), (3824, 7345), (4520, 6214), (4780, 5876)]