21378996

素因数分解:

$2^2\times 3^2\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{193}}^1$

素因数の和:401

約数の個数: 72

約数和(自身を含む): 57834504

約数和(自身を除く): 36455508

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 51, 68, 102, 153, 181, 193, 204, 306, 362, 386, 543, 579, 612, 724, 772, 1086, 1158, 1629, 1737, 2172, 2316, 3077, 3258, 3281, 3474, 6154, 6516, 6562, 6948, 9231, 9843, 12308, 13124, 18462, 19686, 27693, 29529, 34933, 36924, 39372, 55386, 59058, 69866, 104799, 110772, 118116, 139732, 209598, 314397, 419196, 593861, 628794, 1187722, 1257588, 1781583, 2375444, 3563166, 5344749, 7126332, 10689498, 21378996]

約数ペア:

[(1, 21378996), (2, 10689498), (3, 7126332), (4, 5344749), (6, 3563166), (9, 2375444), (12, 1781583), (17, 1257588), (18, 1187722), (34, 628794), (36, 593861), (51, 419196), (68, 314397), (102, 209598), (153, 139732), (181, 118116), (193, 110772), (204, 104799), (306, 69866), (362, 59058), (386, 55386), (543, 39372), (579, 36924), (612, 34933), (724, 29529), (772, 27693), (1086, 19686), (1158, 18462), (1629, 13124), (1737, 12308), (2172, 9843), (2316, 9231), (3077, 6948), (3258, 6562), (3281, 6516), (3474, 6154)]