19977490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{11821}}^1$

素因数の和:11854

約数の個数: 24

約数和(自身を含む): 38941668

約数和(自身を除く): 18964178

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 11821, 23642, 59105, 118210, 153673, 307346, 768365, 1536730, 1997749, 3995498, 9988745, 19977490]

約数ペア:

[(1, 19977490), (2, 9988745), (5, 3995498), (10, 1997749), (13, 1536730), (26, 768365), (65, 307346), (130, 153673), (169, 118210), (338, 59105), (845, 23642), (1690, 11821)]