21191380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4091}}^1$

素因数の和:4144

約数の個数: 48

約数和(自身を含む): 52246656

約数和(自身を除く): 31055276

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4091, 5180, 8182, 16364, 20455, 28637, 40910, 57274, 81820, 114548, 143185, 151367, 286370, 302734, 572740, 605468, 756835, 1059569, 1513670, 2119138, 3027340, 4238276, 5297845, 10595690, 21191380]

約数ペア:

[(1, 21191380), (2, 10595690), (4, 5297845), (5, 4238276), (7, 3027340), (10, 2119138), (14, 1513670), (20, 1059569), (28, 756835), (35, 605468), (37, 572740), (70, 302734), (74, 286370), (140, 151367), (148, 143185), (185, 114548), (259, 81820), (370, 57274), (518, 40910), (740, 28637), (1036, 20455), (1295, 16364), (2590, 8182), (4091, 5180)]