20668960

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{523}}^1$

素因数の和:570

約数の個数: 96

約数和(自身を含む): 55460160

約数和(自身を除く): 34791200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 380, 416, 494, 520, 523, 608, 760, 988, 1040, 1046, 1235, 1520, 1976, 2080, 2092, 2470, 2615, 3040, 3952, 4184, 4940, 5230, 6799, 7904, 8368, 9880, 9937, 10460, 13598, 16736, 19760, 19874, 20920, 27196, 33995, 39520, 39748, 41840, 49685, 54392, 67990, 79496, 83680, 99370, 108784, 129181, 135980, 158992, 198740, 217568, 258362, 271960, 317984, 397480, 516724, 543920, 645905, 794960, 1033448, 1087840, 1291810, 1589920, 2066896, 2583620, 4133792, 5167240, 10334480, 20668960]

約数ペア:

[(1, 20668960), (2, 10334480), (4, 5167240), (5, 4133792), (8, 2583620), (10, 2066896), (13, 1589920), (16, 1291810), (19, 1087840), (20, 1033448), (26, 794960), (32, 645905), (38, 543920), (40, 516724), (52, 397480), (65, 317984), (76, 271960), (80, 258362), (95, 217568), (104, 198740), (130, 158992), (152, 135980), (160, 129181), (190, 108784), (208, 99370), (247, 83680), (260, 79496), (304, 67990), (380, 54392), (416, 49685), (494, 41840), (520, 39748), (523, 39520), (608, 33995), (760, 27196), (988, 20920), (1040, 19874), (1046, 19760), (1235, 16736), (1520, 13598), (1976, 10460), (2080, 9937), (2092, 9880), (2470, 8368), (2615, 7904), (3040, 6799), (3952, 5230), (4184, 4940)]