199974920

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{30671}}^1$

素因数の和:30845

約数の個数: 32

約数和(自身を含む): 452718720

約数和(自身を除く): 252743800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 30671, 61342, 122684, 153355, 245368, 306710, 613420, 1226840, 4999373, 9998746, 19997492, 24996865, 39994984, 49993730, 99987460, 199974920]

約数ペア:

[(1, 199974920), (2, 99987460), (4, 49993730), (5, 39994984), (8, 24996865), (10, 19997492), (20, 9998746), (40, 4999373), (163, 1226840), (326, 613420), (652, 306710), (815, 245368), (1304, 153355), (1630, 122684), (3260, 61342), (6520, 30671)]