21231640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31223}}^1$

素因数の和:31251

約数の個数: 32

約数和(自身を含む): 50582880

約数和(自身を除く): 29351240

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31223, 62446, 124892, 156115, 249784, 312230, 530791, 624460, 1061582, 1248920, 2123164, 2653955, 4246328, 5307910, 10615820, 21231640]

約数ペア:

[(1, 21231640), (2, 10615820), (4, 5307910), (5, 4246328), (8, 2653955), (10, 2123164), (17, 1248920), (20, 1061582), (34, 624460), (40, 530791), (68, 312230), (85, 249784), (136, 156115), (170, 124892), (340, 62446), (680, 31223)]