81023980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{2699}}^1$

素因数の和:2806

約数の個数: 48

約数和(自身を含む): 181440000

約数和(自身を除く): 100416020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 79, 95, 158, 190, 316, 380, 395, 790, 1501, 1580, 2699, 3002, 5398, 6004, 7505, 10796, 13495, 15010, 26990, 30020, 51281, 53980, 102562, 205124, 213221, 256405, 426442, 512810, 852884, 1025620, 1066105, 2132210, 4051199, 4264420, 8102398, 16204796, 20255995, 40511990, 81023980]

約数ペア:

[(1, 81023980), (2, 40511990), (4, 20255995), (5, 16204796), (10, 8102398), (19, 4264420), (20, 4051199), (38, 2132210), (76, 1066105), (79, 1025620), (95, 852884), (158, 512810), (190, 426442), (316, 256405), (380, 213221), (395, 205124), (790, 102562), (1501, 53980), (1580, 51281), (2699, 30020), (3002, 26990), (5398, 15010), (6004, 13495), (7505, 10796)]