19864420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{1181}}^1$

素因数の和:1248

約数の個数: 36

約数和(自身を含む): 43239924

約数和(自身を除く): 23375504

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 841, 1181, 1682, 2362, 3364, 4205, 4724, 5905, 8410, 11810, 16820, 23620, 34249, 68498, 136996, 171245, 342490, 684980, 993221, 1986442, 3972884, 4966105, 9932210, 19864420]

約数ペア:

[(1, 19864420), (2, 9932210), (4, 4966105), (5, 3972884), (10, 1986442), (20, 993221), (29, 684980), (58, 342490), (116, 171245), (145, 136996), (290, 68498), (580, 34249), (841, 23620), (1181, 16820), (1682, 11810), (2362, 8410), (3364, 5905), (4205, 4724)]