21305020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{857}}^1$

素因数の和:990

約数の個数: 48

約数和(自身を含む): 49297248

約数和(自身を除く): 27992228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 113, 220, 226, 452, 565, 857, 1130, 1243, 1714, 2260, 2486, 3428, 4285, 4972, 6215, 8570, 9427, 12430, 17140, 18854, 24860, 37708, 47135, 94270, 96841, 188540, 193682, 387364, 484205, 968410, 1065251, 1936820, 2130502, 4261004, 5326255, 10652510, 21305020]

約数ペア:

[(1, 21305020), (2, 10652510), (4, 5326255), (5, 4261004), (10, 2130502), (11, 1936820), (20, 1065251), (22, 968410), (44, 484205), (55, 387364), (110, 193682), (113, 188540), (220, 96841), (226, 94270), (452, 47135), (565, 37708), (857, 24860), (1130, 18854), (1243, 17140), (1714, 12430), (2260, 9427), (2486, 8570), (3428, 6215), (4285, 4972)]