1245640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1$

素因数の和:190

約数の個数: 64

約数和(自身を含む): 3240000

約数和(自身を除く): 1994360

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 149, 152, 190, 209, 220, 298, 380, 418, 440, 596, 745, 760, 836, 1045, 1192, 1490, 1639, 1672, 2090, 2831, 2980, 3278, 4180, 5662, 5960, 6556, 8195, 8360, 11324, 13112, 14155, 16390, 22648, 28310, 31141, 32780, 56620, 62282, 65560, 113240, 124564, 155705, 249128, 311410, 622820, 1245640]

約数ペア:

[(1, 1245640), (2, 622820), (4, 311410), (5, 249128), (8, 155705), (10, 124564), (11, 113240), (19, 65560), (20, 62282), (22, 56620), (38, 32780), (40, 31141), (44, 28310), (55, 22648), (76, 16390), (88, 14155), (95, 13112), (110, 11324), (149, 8360), (152, 8195), (190, 6556), (209, 5960), (220, 5662), (298, 4180), (380, 3278), (418, 2980), (440, 2831), (596, 2090), (745, 1672), (760, 1639), (836, 1490), (1045, 1192)]