21340820

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{311}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 46545408

約数和(自身を除く): 25204588

約数列:

[1, 2, 4, 5, 10, 20, 47, 73, 94, 146, 188, 235, 292, 311, 365, 470, 622, 730, 940, 1244, 1460, 1555, 3110, 3431, 6220, 6862, 13724, 14617, 17155, 22703, 29234, 34310, 45406, 58468, 68620, 73085, 90812, 113515, 146170, 227030, 292340, 454060, 1067041, 2134082, 4268164, 5335205, 10670410, 21340820]

約数ペア:

[(1, 21340820), (2, 10670410), (4, 5335205), (5, 4268164), (10, 2134082), (20, 1067041), (47, 454060), (73, 292340), (94, 227030), (146, 146170), (188, 113515), (235, 90812), (292, 73085), (311, 68620), (365, 58468), (470, 45406), (622, 34310), (730, 29234), (940, 22703), (1244, 17155), (1460, 14617), (1555, 13724), (3110, 6862), (3431, 6220)]