21030390

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1291}}^1$

素因数の和:1485

約数の個数: 48

約数和(自身を含む): 55023696

約数和(自身を除く): 33993306

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 181, 362, 543, 905, 1086, 1291, 1629, 1810, 2582, 2715, 3258, 3873, 5430, 6455, 7746, 8145, 11619, 12910, 16290, 19365, 23238, 38730, 58095, 116190, 233671, 467342, 701013, 1168355, 1402026, 2103039, 2336710, 3505065, 4206078, 7010130, 10515195, 21030390]

約数ペア:

[(1, 21030390), (2, 10515195), (3, 7010130), (5, 4206078), (6, 3505065), (9, 2336710), (10, 2103039), (15, 1402026), (18, 1168355), (30, 701013), (45, 467342), (90, 233671), (181, 116190), (362, 58095), (543, 38730), (905, 23238), (1086, 19365), (1291, 16290), (1629, 12910), (1810, 11619), (2582, 8145), (2715, 7746), (3258, 6455), (3873, 5430)]