20860400

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^2\times {\mathrm{431}}^1$

素因数の和:471

約数の個数: 90

約数和(自身を含む): 55215216

約数和(自身を除く): 34354816

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 121, 176, 200, 220, 242, 275, 400, 431, 440, 484, 550, 605, 862, 880, 968, 1100, 1210, 1724, 1936, 2155, 2200, 2420, 3025, 3448, 4310, 4400, 4741, 4840, 6050, 6896, 8620, 9482, 9680, 10775, 12100, 17240, 18964, 21550, 23705, 24200, 34480, 37928, 43100, 47410, 48400, 52151, 75856, 86200, 94820, 104302, 118525, 172400, 189640, 208604, 237050, 260755, 379280, 417208, 474100, 521510, 834416, 948200, 1043020, 1303775, 1896400, 2086040, 2607550, 4172080, 5215100, 10430200, 20860400]

約数ペア:

[(1, 20860400), (2, 10430200), (4, 5215100), (5, 4172080), (8, 2607550), (10, 2086040), (11, 1896400), (16, 1303775), (20, 1043020), (22, 948200), (25, 834416), (40, 521510), (44, 474100), (50, 417208), (55, 379280), (80, 260755), (88, 237050), (100, 208604), (110, 189640), (121, 172400), (176, 118525), (200, 104302), (220, 94820), (242, 86200), (275, 75856), (400, 52151), (431, 48400), (440, 47410), (484, 43100), (550, 37928), (605, 34480), (862, 24200), (880, 23705), (968, 21550), (1100, 18964), (1210, 17240), (1724, 12100), (1936, 10775), (2155, 9680), (2200, 9482), (2420, 8620), (3025, 6896), (3448, 6050), (4310, 4840), (4400, 4741)]