20213090891

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1\times {\mathrm{1601}}^1$

素因数の和:1896

約数の個数: 48

約数和(自身を含む): 25246494720

約数和(自身を除く): 5033403829

約数列:

[1, 7, 19, 49, 71, 133, 191, 497, 931, 1337, 1349, 1601, 3479, 3629, 9359, 9443, 11207, 13561, 25403, 30419, 66101, 78449, 94927, 113671, 177821, 212933, 257659, 305791, 664489, 795697, 1490531, 1803613, 2140537, 2159749, 5569879, 5810029, 12625291, 14983759, 15118243, 21711161, 40670203, 105827701, 151978127, 284691421, 412512059, 1063846889, 2887584413, 20213090891]

約数ペア:

[(1, 20213090891), (7, 2887584413), (19, 1063846889), (49, 412512059), (71, 284691421), (133, 151978127), (191, 105827701), (497, 40670203), (931, 21711161), (1337, 15118243), (1349, 14983759), (1601, 12625291), (3479, 5810029), (3629, 5569879), (9359, 2159749), (9443, 2140537), (11207, 1803613), (13561, 1490531), (25403, 795697), (30419, 664489), (66101, 305791), (78449, 257659), (94927, 212933), (113671, 177821)]