28406420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{613}}^1$

素因数の和:960

約数の個数: 48

約数和(自身を含む): 68492928

約数和(自身を除く): 40086508

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 331, 613, 662, 1226, 1324, 1655, 2317, 2452, 3065, 3310, 4291, 4634, 6130, 6620, 8582, 9268, 11585, 12260, 17164, 21455, 23170, 42910, 46340, 85820, 202903, 405806, 811612, 1014515, 1420321, 2029030, 2840642, 4058060, 5681284, 7101605, 14203210, 28406420]

約数ペア:

[(1, 28406420), (2, 14203210), (4, 7101605), (5, 5681284), (7, 4058060), (10, 2840642), (14, 2029030), (20, 1420321), (28, 1014515), (35, 811612), (70, 405806), (140, 202903), (331, 85820), (613, 46340), (662, 42910), (1226, 23170), (1324, 21455), (1655, 17164), (2317, 12260), (2452, 11585), (3065, 9268), (3310, 8582), (4291, 6620), (4634, 6130)]