1641980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 3780000

約数和(自身を除く): 2138020

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 95, 116, 145, 149, 190, 290, 298, 380, 551, 580, 596, 745, 1102, 1490, 2204, 2755, 2831, 2980, 4321, 5510, 5662, 8642, 11020, 11324, 14155, 17284, 21605, 28310, 43210, 56620, 82099, 86420, 164198, 328396, 410495, 820990, 1641980]

約数ペア:

[(1, 1641980), (2, 820990), (4, 410495), (5, 328396), (10, 164198), (19, 86420), (20, 82099), (29, 56620), (38, 43210), (58, 28310), (76, 21605), (95, 17284), (116, 14155), (145, 11324), (149, 11020), (190, 8642), (290, 5662), (298, 5510), (380, 4321), (551, 2980), (580, 2831), (596, 2755), (745, 2204), (1102, 1490)]