81258640

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{401}}^1$

素因数の和:580

約数の個数: 80

約数和(自身を含む): 201884400

約数和(自身を除く): 120625760

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 149, 170, 272, 298, 340, 401, 596, 680, 745, 802, 1192, 1360, 1490, 1604, 2005, 2384, 2533, 2980, 3208, 4010, 5066, 5960, 6416, 6817, 8020, 10132, 11920, 12665, 13634, 16040, 20264, 25330, 27268, 32080, 34085, 40528, 50660, 54536, 59749, 68170, 101320, 109072, 119498, 136340, 202640, 238996, 272680, 298745, 477992, 545360, 597490, 955984, 1015733, 1194980, 2031466, 2389960, 4062932, 4779920, 5078665, 8125864, 10157330, 16251728, 20314660, 40629320, 81258640]

約数ペア:

[(1, 81258640), (2, 40629320), (4, 20314660), (5, 16251728), (8, 10157330), (10, 8125864), (16, 5078665), (17, 4779920), (20, 4062932), (34, 2389960), (40, 2031466), (68, 1194980), (80, 1015733), (85, 955984), (136, 597490), (149, 545360), (170, 477992), (272, 298745), (298, 272680), (340, 238996), (401, 202640), (596, 136340), (680, 119498), (745, 109072), (802, 101320), (1192, 68170), (1360, 59749), (1490, 54536), (1604, 50660), (2005, 40528), (2384, 34085), (2533, 32080), (2980, 27268), (3208, 25330), (4010, 20264), (5066, 16040), (5960, 13634), (6416, 12665), (6817, 11920), (8020, 10132)]