21977290

素因数分解:

$2^1\times 5^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1\times {\mathrm{163}}^1$

素因数の和:406

約数の個数: 32

約数和(自身を含む): 40501440

約数和(自身を除く): 18524150

約数列:

[1, 2, 5, 10, 97, 139, 163, 194, 278, 326, 485, 695, 815, 970, 1390, 1630, 13483, 15811, 22657, 26966, 31622, 45314, 67415, 79055, 113285, 134830, 158110, 226570, 2197729, 4395458, 10988645, 21977290]

約数ペア:

[(1, 21977290), (2, 10988645), (5, 4395458), (10, 2197729), (97, 226570), (139, 158110), (163, 134830), (194, 113285), (278, 79055), (326, 67415), (485, 45314), (695, 31622), (815, 26966), (970, 22657), (1390, 15811), (1630, 13483)]