81805640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{15377}}^1$

素因数の和:15414

約数の個数: 64

約数和(自身を含む): 221443200

約数和(自身を除く): 139637560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 5320, 15377, 30754, 61508, 76885, 107639, 123016, 153770, 215278, 292163, 307540, 430556, 538195, 584326, 615080, 861112, 1076390, 1168652, 1460815, 2045141, 2152780, 2337304, 2921630, 4090282, 4305560, 5843260, 8180564, 10225705, 11686520, 16361128, 20451410, 40902820, 81805640]

約数ペア:

[(1, 81805640), (2, 40902820), (4, 20451410), (5, 16361128), (7, 11686520), (8, 10225705), (10, 8180564), (14, 5843260), (19, 4305560), (20, 4090282), (28, 2921630), (35, 2337304), (38, 2152780), (40, 2045141), (56, 1460815), (70, 1168652), (76, 1076390), (95, 861112), (133, 615080), (140, 584326), (152, 538195), (190, 430556), (266, 307540), (280, 292163), (380, 215278), (532, 153770), (665, 123016), (760, 107639), (1064, 76885), (1330, 61508), (2660, 30754), (5320, 15377)]