20454969680

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2872889}}^1$

素因数の和:2872991

約数の個数: 40

約数和(自身を含む): 48092178600

約数和(自身を除く): 27637208920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 7120, 2872889, 5745778, 11491556, 14364445, 22983112, 28728890, 45966224, 57457780, 114915560, 229831120, 255687121, 511374242, 1022748484, 1278435605, 2045496968, 2556871210, 4090993936, 5113742420, 10227484840, 20454969680]

約数ペア:

[(1, 20454969680), (2, 10227484840), (4, 5113742420), (5, 4090993936), (8, 2556871210), (10, 2045496968), (16, 1278435605), (20, 1022748484), (40, 511374242), (80, 255687121), (89, 229831120), (178, 114915560), (356, 57457780), (445, 45966224), (712, 28728890), (890, 22983112), (1424, 14364445), (1780, 11491556), (3560, 5745778), (7120, 2872889)]