81711280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1847}}^1$

素因数の和:1946

約数の個数: 80

約数和(自身を含む): 219985920

約数和(自身を除く): 138274640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 79, 80, 112, 140, 158, 280, 316, 395, 553, 560, 632, 790, 1106, 1264, 1580, 1847, 2212, 2765, 3160, 3694, 4424, 5530, 6320, 7388, 8848, 9235, 11060, 12929, 14776, 18470, 22120, 25858, 29552, 36940, 44240, 51716, 64645, 73880, 103432, 129290, 145913, 147760, 206864, 258580, 291826, 517160, 583652, 729565, 1021391, 1034320, 1167304, 1459130, 2042782, 2334608, 2918260, 4085564, 5106955, 5836520, 8171128, 10213910, 11673040, 16342256, 20427820, 40855640, 81711280]

約数ペア:

[(1, 81711280), (2, 40855640), (4, 20427820), (5, 16342256), (7, 11673040), (8, 10213910), (10, 8171128), (14, 5836520), (16, 5106955), (20, 4085564), (28, 2918260), (35, 2334608), (40, 2042782), (56, 1459130), (70, 1167304), (79, 1034320), (80, 1021391), (112, 729565), (140, 583652), (158, 517160), (280, 291826), (316, 258580), (395, 206864), (553, 147760), (560, 145913), (632, 129290), (790, 103432), (1106, 73880), (1264, 64645), (1580, 51716), (1847, 44240), (2212, 36940), (2765, 29552), (3160, 25858), (3694, 22120), (4424, 18470), (5530, 14776), (6320, 12929), (7388, 11060), (8848, 9235)]