21145020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27109}}^1$

素因数の和:27134

約数の個数: 48

約数和(自身を含む): 63762720

約数和(自身を除く): 42617700

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, 27109, 54218, 81327, 108436, 135545, 162654, 271090, 325308, 352417, 406635, 542180, 704834, 813270, 1057251, 1409668, 1626540, 1762085, 2114502, 3524170, 4229004, 5286255, 7048340, 10572510, 21145020]

約数ペア:

[(1, 21145020), (2, 10572510), (3, 7048340), (4, 5286255), (5, 4229004), (6, 3524170), (10, 2114502), (12, 1762085), (13, 1626540), (15, 1409668), (20, 1057251), (26, 813270), (30, 704834), (39, 542180), (52, 406635), (60, 352417), (65, 325308), (78, 271090), (130, 162654), (156, 135545), (195, 108436), (260, 81327), (390, 54218), (780, 27109)]