19800515

素因数分解:

$5^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{1621}}^1$

素因数の和:1982

約数の個数: 16

約数和(自身を含む): 27249600

約数和(自身を除く): 7449085

約数列:

[1, 5, 7, 35, 349, 1621, 1745, 2443, 8105, 11347, 12215, 56735, 565729, 2828645, 3960103, 19800515]

約数ペア:

[(1, 19800515), (5, 3960103), (7, 2828645), (35, 565729), (349, 56735), (1621, 12215), (1745, 11347), (2443, 8105)]