128399240

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{1559}}^1$

素因数の和:1670

約数の個数: 64

約数和(自身を含む): 303264000

約数和(自身を除く): 174864760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 71, 116, 142, 145, 232, 284, 290, 355, 568, 580, 710, 1160, 1420, 1559, 2059, 2840, 3118, 4118, 6236, 7795, 8236, 10295, 12472, 15590, 16472, 20590, 31180, 41180, 45211, 62360, 82360, 90422, 110689, 180844, 221378, 226055, 361688, 442756, 452110, 553445, 885512, 904220, 1106890, 1808440, 2213780, 3209981, 4427560, 6419962, 12839924, 16049905, 25679848, 32099810, 64199620, 128399240]

約数ペア:

[(1, 128399240), (2, 64199620), (4, 32099810), (5, 25679848), (8, 16049905), (10, 12839924), (20, 6419962), (29, 4427560), (40, 3209981), (58, 2213780), (71, 1808440), (116, 1106890), (142, 904220), (145, 885512), (232, 553445), (284, 452110), (290, 442756), (355, 361688), (568, 226055), (580, 221378), (710, 180844), (1160, 110689), (1420, 90422), (1559, 82360), (2059, 62360), (2840, 45211), (3118, 41180), (4118, 31180), (6236, 20590), (7795, 16472), (8236, 15590), (10295, 12472)]