31181980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^2\times {\mathrm{419}}^1$

素因数の和:550

約数の個数: 36

約数和(自身を含む): 66732120

約数和(自身を除く): 35550140

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 419, 610, 838, 1220, 1676, 2095, 3721, 4190, 7442, 8380, 14884, 18605, 25559, 37210, 51118, 74420, 102236, 127795, 255590, 511180, 1559099, 3118198, 6236396, 7795495, 15590990, 31181980]

約数ペア:

[(1, 31181980), (2, 15590990), (4, 7795495), (5, 6236396), (10, 3118198), (20, 1559099), (61, 511180), (122, 255590), (244, 127795), (305, 102236), (419, 74420), (610, 51118), (838, 37210), (1220, 25559), (1676, 18605), (2095, 14884), (3721, 8380), (4190, 7442)]