21784220

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:155

約数の個数: 72

約数和(自身を含む): 50168160

約数和(自身を除く): 28383940

約数列:

[1, 2, 4, 5, 10, 20, 23, 29, 46, 58, 71, 92, 115, 116, 142, 145, 230, 284, 290, 355, 460, 529, 580, 667, 710, 1058, 1334, 1420, 1633, 2059, 2116, 2645, 2668, 3266, 3335, 4118, 5290, 6532, 6670, 8165, 8236, 10295, 10580, 13340, 15341, 16330, 20590, 30682, 32660, 37559, 41180, 47357, 61364, 75118, 76705, 94714, 150236, 153410, 187795, 189428, 236785, 306820, 375590, 473570, 751180, 947140, 1089211, 2178422, 4356844, 5446055, 10892110, 21784220]

約数ペア:

[(1, 21784220), (2, 10892110), (4, 5446055), (5, 4356844), (10, 2178422), (20, 1089211), (23, 947140), (29, 751180), (46, 473570), (58, 375590), (71, 306820), (92, 236785), (115, 189428), (116, 187795), (142, 153410), (145, 150236), (230, 94714), (284, 76705), (290, 75118), (355, 61364), (460, 47357), (529, 41180), (580, 37559), (667, 32660), (710, 30682), (1058, 20590), (1334, 16330), (1420, 15341), (1633, 13340), (2059, 10580), (2116, 10295), (2645, 8236), (2668, 8165), (3266, 6670), (3335, 6532), (4118, 5290)]