20355920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{37}}^1$

素因数の和:109

約数の個数: 120

約数和(自身を含む): 54720456

約数和(自身を除く): 34364536

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 37, 40, 46, 52, 65, 74, 80, 92, 104, 115, 130, 148, 184, 185, 208, 230, 260, 296, 299, 368, 370, 460, 481, 520, 529, 592, 598, 740, 851, 920, 962, 1040, 1058, 1196, 1480, 1495, 1702, 1840, 1924, 2116, 2392, 2405, 2645, 2960, 2990, 3404, 3848, 4232, 4255, 4784, 4810, 5290, 5980, 6808, 6877, 7696, 8464, 8510, 9620, 10580, 11063, 11960, 13616, 13754, 17020, 19240, 19573, 21160, 22126, 23920, 27508, 34040, 34385, 38480, 39146, 42320, 44252, 55016, 55315, 68080, 68770, 78292, 88504, 97865, 110032, 110630, 137540, 156584, 177008, 195730, 221260, 254449, 275080, 313168, 391460, 442520, 508898, 550160, 782920, 885040, 1017796, 1272245, 1565840, 2035592, 2544490, 4071184, 5088980, 10177960, 20355920]

約数ペア:

[(1, 20355920), (2, 10177960), (4, 5088980), (5, 4071184), (8, 2544490), (10, 2035592), (13, 1565840), (16, 1272245), (20, 1017796), (23, 885040), (26, 782920), (37, 550160), (40, 508898), (46, 442520), (52, 391460), (65, 313168), (74, 275080), (80, 254449), (92, 221260), (104, 195730), (115, 177008), (130, 156584), (148, 137540), (184, 110630), (185, 110032), (208, 97865), (230, 88504), (260, 78292), (296, 68770), (299, 68080), (368, 55315), (370, 55016), (460, 44252), (481, 42320), (520, 39146), (529, 38480), (592, 34385), (598, 34040), (740, 27508), (851, 23920), (920, 22126), (962, 21160), (1040, 19573), (1058, 19240), (1196, 17020), (1480, 13754), (1495, 13616), (1702, 11960), (1840, 11063), (1924, 10580), (2116, 9620), (2392, 8510), (2405, 8464), (2645, 7696), (2960, 6877), (2990, 6808), (3404, 5980), (3848, 5290), (4232, 4810), (4255, 4784)]