20656900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{211}}^1$

素因数の和:325

約数の個数: 72

約数和(自身を含む): 49684320

約数和(自身を除く): 29027420

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 89, 100, 110, 178, 211, 220, 275, 356, 422, 445, 550, 844, 890, 979, 1055, 1100, 1780, 1958, 2110, 2225, 2321, 3916, 4220, 4450, 4642, 4895, 5275, 8900, 9284, 9790, 10550, 11605, 18779, 19580, 21100, 23210, 24475, 37558, 46420, 48950, 58025, 75116, 93895, 97900, 116050, 187790, 206569, 232100, 375580, 413138, 469475, 826276, 938950, 1032845, 1877900, 2065690, 4131380, 5164225, 10328450, 20656900]

約数ペア:

[(1, 20656900), (2, 10328450), (4, 5164225), (5, 4131380), (10, 2065690), (11, 1877900), (20, 1032845), (22, 938950), (25, 826276), (44, 469475), (50, 413138), (55, 375580), (89, 232100), (100, 206569), (110, 187790), (178, 116050), (211, 97900), (220, 93895), (275, 75116), (356, 58025), (422, 48950), (445, 46420), (550, 37558), (844, 24475), (890, 23210), (979, 21100), (1055, 19580), (1100, 18779), (1780, 11605), (1958, 10550), (2110, 9790), (2225, 9284), (2321, 8900), (3916, 5275), (4220, 4895), (4450, 4642)]