661371816

素因数分解:

$2^3\times 3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{89}}^2$

素因数の和:272

約数の個数: 144

約数和(自身を含む): 1972628640

約数和(自身を除く): 1311256824

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 49, 56, 71, 84, 89, 98, 142, 147, 168, 178, 196, 213, 267, 284, 294, 356, 392, 426, 497, 534, 568, 588, 623, 712, 852, 994, 1068, 1176, 1246, 1491, 1704, 1869, 1988, 2136, 2492, 2982, 3479, 3738, 3976, 4361, 4984, 5964, 6319, 6958, 7476, 7921, 8722, 10437, 11928, 12638, 13083, 13916, 14952, 15842, 17444, 18957, 20874, 23763, 25276, 26166, 27832, 31684, 34888, 37914, 41748, 44233, 47526, 50552, 52332, 55447, 63368, 75828, 83496, 88466, 95052, 104664, 110894, 132699, 151656, 166341, 176932, 190104, 221788, 265398, 309631, 332682, 353864, 388129, 443576, 530796, 562391, 619262, 665364, 776258, 928893, 1061592, 1124782, 1164387, 1238524, 1330728, 1552516, 1687173, 1857786, 2249564, 2328774, 2477048, 3105032, 3374346, 3715572, 3936737, 4499128, 4657548, 6748692, 7431144, 7873474, 9315096, 11810211, 13497384, 15746948, 23620422, 27557159, 31493896, 47240844, 55114318, 82671477, 94481688, 110228636, 165342954, 220457272, 330685908, 661371816]

約数ペア:

[(1, 661371816), (2, 330685908), (3, 220457272), (4, 165342954), (6, 110228636), (7, 94481688), (8, 82671477), (12, 55114318), (14, 47240844), (21, 31493896), (24, 27557159), (28, 23620422), (42, 15746948), (49, 13497384), (56, 11810211), (71, 9315096), (84, 7873474), (89, 7431144), (98, 6748692), (142, 4657548), (147, 4499128), (168, 3936737), (178, 3715572), (196, 3374346), (213, 3105032), (267, 2477048), (284, 2328774), (294, 2249564), (356, 1857786), (392, 1687173), (426, 1552516), (497, 1330728), (534, 1238524), (568, 1164387), (588, 1124782), (623, 1061592), (712, 928893), (852, 776258), (994, 665364), (1068, 619262), (1176, 562391), (1246, 530796), (1491, 443576), (1704, 388129), (1869, 353864), (1988, 332682), (2136, 309631), (2492, 265398), (2982, 221788), (3479, 190104), (3738, 176932), (3976, 166341), (4361, 151656), (4984, 132699), (5964, 110894), (6319, 104664), (6958, 95052), (7476, 88466), (7921, 83496), (8722, 75828), (10437, 63368), (11928, 55447), (12638, 52332), (13083, 50552), (13916, 47526), (14952, 44233), (15842, 41748), (17444, 37914), (18957, 34888), (20874, 31684), (23763, 27832), (25276, 26166)]