21315996

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1231}}^1$

素因数の和:1291

約数の個数: 72

約数和(自身を含む): 59643584

約数和(自身を除く): 38327588

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 37, 39, 52, 74, 78, 111, 117, 148, 156, 222, 234, 333, 444, 468, 481, 666, 962, 1231, 1332, 1443, 1924, 2462, 2886, 3693, 4329, 4924, 5772, 7386, 8658, 11079, 14772, 16003, 17316, 22158, 32006, 44316, 45547, 48009, 64012, 91094, 96018, 136641, 144027, 182188, 192036, 273282, 288054, 409923, 546564, 576108, 592111, 819846, 1184222, 1639692, 1776333, 2368444, 3552666, 5328999, 7105332, 10657998, 21315996]

約数ペア:

[(1, 21315996), (2, 10657998), (3, 7105332), (4, 5328999), (6, 3552666), (9, 2368444), (12, 1776333), (13, 1639692), (18, 1184222), (26, 819846), (36, 592111), (37, 576108), (39, 546564), (52, 409923), (74, 288054), (78, 273282), (111, 192036), (117, 182188), (148, 144027), (156, 136641), (222, 96018), (234, 91094), (333, 64012), (444, 48009), (468, 45547), (481, 44316), (666, 32006), (962, 22158), (1231, 17316), (1332, 16003), (1443, 14772), (1924, 11079), (2462, 8658), (2886, 7386), (3693, 5772), (4329, 4924)]