20178320

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{401}}^1$

素因数の和:468

約数の個数: 80

約数和(自身を含む): 51144048

約数和(自身を除く): 30965728

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 37, 40, 68, 74, 80, 85, 136, 148, 170, 185, 272, 296, 340, 370, 401, 592, 629, 680, 740, 802, 1258, 1360, 1480, 1604, 2005, 2516, 2960, 3145, 3208, 4010, 5032, 6290, 6416, 6817, 8020, 10064, 12580, 13634, 14837, 16040, 25160, 27268, 29674, 32080, 34085, 50320, 54536, 59348, 68170, 74185, 109072, 118696, 136340, 148370, 237392, 252229, 272680, 296740, 504458, 545360, 593480, 1008916, 1186960, 1261145, 2017832, 2522290, 4035664, 5044580, 10089160, 20178320]

約数ペア:

[(1, 20178320), (2, 10089160), (4, 5044580), (5, 4035664), (8, 2522290), (10, 2017832), (16, 1261145), (17, 1186960), (20, 1008916), (34, 593480), (37, 545360), (40, 504458), (68, 296740), (74, 272680), (80, 252229), (85, 237392), (136, 148370), (148, 136340), (170, 118696), (185, 109072), (272, 74185), (296, 68170), (340, 59348), (370, 54536), (401, 50320), (592, 34085), (629, 32080), (680, 29674), (740, 27268), (802, 25160), (1258, 16040), (1360, 14837), (1480, 13634), (1604, 12580), (2005, 10064), (2516, 8020), (2960, 6817), (3145, 6416), (3208, 6290), (4010, 5032)]