20645020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{449}}^1$

素因数の和:499

約数の個数: 72

約数和(自身を含む): 50274000

約数和(自身を除く): 29628980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 121, 190, 209, 220, 242, 380, 418, 449, 484, 605, 836, 898, 1045, 1210, 1796, 2090, 2245, 2299, 2420, 4180, 4490, 4598, 4939, 8531, 8980, 9196, 9878, 11495, 17062, 19756, 22990, 24695, 34124, 42655, 45980, 49390, 54329, 85310, 93841, 98780, 108658, 170620, 187682, 217316, 271645, 375364, 469205, 543290, 938410, 1032251, 1086580, 1876820, 2064502, 4129004, 5161255, 10322510, 20645020]

約数ペア:

[(1, 20645020), (2, 10322510), (4, 5161255), (5, 4129004), (10, 2064502), (11, 1876820), (19, 1086580), (20, 1032251), (22, 938410), (38, 543290), (44, 469205), (55, 375364), (76, 271645), (95, 217316), (110, 187682), (121, 170620), (190, 108658), (209, 98780), (220, 93841), (242, 85310), (380, 54329), (418, 49390), (449, 45980), (484, 42655), (605, 34124), (836, 24695), (898, 22990), (1045, 19756), (1210, 17062), (1796, 11495), (2090, 9878), (2245, 9196), (2299, 8980), (2420, 8531), (4180, 4939), (4490, 4598)]