28778720

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^2\times {\mathrm{107}}^1$

素因数の和:204

約数の個数: 72

約数和(自身を含む): 70339752

約数和(自身を除く): 41561032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 107, 160, 164, 205, 214, 328, 410, 428, 535, 656, 820, 856, 1070, 1312, 1640, 1681, 1712, 2140, 3280, 3362, 3424, 4280, 4387, 6560, 6724, 8405, 8560, 8774, 13448, 16810, 17120, 17548, 21935, 26896, 33620, 35096, 43870, 53792, 67240, 70192, 87740, 134480, 140384, 175480, 179867, 268960, 350960, 359734, 701920, 719468, 899335, 1438936, 1798670, 2877872, 3597340, 5755744, 7194680, 14389360, 28778720]

約数ペア:

[(1, 28778720), (2, 14389360), (4, 7194680), (5, 5755744), (8, 3597340), (10, 2877872), (16, 1798670), (20, 1438936), (32, 899335), (40, 719468), (41, 701920), (80, 359734), (82, 350960), (107, 268960), (160, 179867), (164, 175480), (205, 140384), (214, 134480), (328, 87740), (410, 70192), (428, 67240), (535, 53792), (656, 43870), (820, 35096), (856, 33620), (1070, 26896), (1312, 21935), (1640, 17548), (1681, 17120), (1712, 16810), (2140, 13448), (3280, 8774), (3362, 8560), (3424, 8405), (4280, 6724), (4387, 6560)]