21000907990

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{613}}^1\times {\mathrm{8807}}^1$

素因数の和:9816

約数の個数: 32

約数和(自身を含む): 37964946240

約数和(自身を除く): 16964038250

約数列:

[1, 2, 5, 10, 389, 613, 778, 1226, 1945, 3065, 3890, 6130, 8807, 17614, 44035, 88070, 238457, 476914, 1192285, 2384570, 3425923, 5398691, 6851846, 10797382, 17129615, 26993455, 34259230, 53986910, 2100090799, 4200181598, 10500453995, 21000907990]

約数ペア:

[(1, 21000907990), (2, 10500453995), (5, 4200181598), (10, 2100090799), (389, 53986910), (613, 34259230), (778, 26993455), (1226, 17129615), (1945, 10797382), (3065, 6851846), (3890, 5398691), (6130, 3425923), (8807, 2384570), (17614, 1192285), (44035, 476914), (88070, 238457)]