20235540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{25943}}^1$

素因数の和:25968

約数の個数: 48

約数和(自身を含む): 61020288

約数和(自身を除く): 40784748

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 25943, 51886, 77829, 103772, 129715, 155658, 259430, 311316, 337259, 389145, 518860, 674518, 778290, 1011777, 1349036, 1556580, 1686295, 2023554, 3372590, 4047108, 5058885, 6745180, 10117770, 20235540]

約数ペア:

[(1, 20235540), (2, 10117770), (3, 6745180), (4, 5058885), (5, 4047108), (6, 3372590), (10, 2023554), (12, 1686295), (13, 1556580), (15, 1349036), (20, 1011777), (26, 778290), (30, 674518), (39, 518860), (52, 389145), (60, 337259), (65, 311316), (78, 259430), (130, 155658), (156, 129715), (195, 103772), (260, 77829), (390, 51886), (780, 25943)]