19811870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{617}}^1$

素因数の和:669

約数の個数: 48

約数和(自身を含む): 40713840

約数和(自身を除く): 20901970

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 169, 190, 247, 338, 494, 617, 845, 1234, 1235, 1690, 2470, 3085, 3211, 6170, 6422, 8021, 11723, 16042, 16055, 23446, 32110, 40105, 58615, 80210, 104273, 117230, 152399, 208546, 304798, 521365, 761995, 1042730, 1523990, 1981187, 3962374, 9905935, 19811870]

約数ペア:

[(1, 19811870), (2, 9905935), (5, 3962374), (10, 1981187), (13, 1523990), (19, 1042730), (26, 761995), (38, 521365), (65, 304798), (95, 208546), (130, 152399), (169, 117230), (190, 104273), (247, 80210), (338, 58615), (494, 40105), (617, 32110), (845, 23446), (1234, 16055), (1235, 16042), (1690, 11723), (2470, 8021), (3085, 6422), (3211, 6170)]