21207255

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{773}}^1$

素因数の和:871

約数の個数: 32

約数和(自身を含む): 35665920

約数和(自身を除く): 14458665

約数列:

[1, 3, 5, 15, 31, 59, 93, 155, 177, 295, 465, 773, 885, 1829, 2319, 3865, 5487, 9145, 11595, 23963, 27435, 45607, 71889, 119815, 136821, 228035, 359445, 684105, 1413817, 4241451, 7069085, 21207255]

約数ペア:

[(1, 21207255), (3, 7069085), (5, 4241451), (15, 1413817), (31, 684105), (59, 359445), (93, 228035), (155, 136821), (177, 119815), (295, 71889), (465, 45607), (773, 27435), (885, 23963), (1829, 11595), (2319, 9145), (3865, 5487)]