28404040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1663}}^1$

素因数の和:1742

約数の個数: 64

約数和(自身を含む): 74280960

約数和(自身を除く): 45876920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 61, 70, 122, 140, 244, 280, 305, 427, 488, 610, 854, 1220, 1663, 1708, 2135, 2440, 3326, 3416, 4270, 6652, 8315, 8540, 11641, 13304, 16630, 17080, 23282, 33260, 46564, 58205, 66520, 93128, 101443, 116410, 202886, 232820, 405772, 465640, 507215, 710101, 811544, 1014430, 1420202, 2028860, 2840404, 3550505, 4057720, 5680808, 7101010, 14202020, 28404040]

約数ペア:

[(1, 28404040), (2, 14202020), (4, 7101010), (5, 5680808), (7, 4057720), (8, 3550505), (10, 2840404), (14, 2028860), (20, 1420202), (28, 1014430), (35, 811544), (40, 710101), (56, 507215), (61, 465640), (70, 405772), (122, 232820), (140, 202886), (244, 116410), (280, 101443), (305, 93128), (427, 66520), (488, 58205), (610, 46564), (854, 33260), (1220, 23282), (1663, 17080), (1708, 16630), (2135, 13304), (2440, 11641), (3326, 8540), (3416, 8315), (4270, 6652)]