25681640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1$

素因数の和:330

約数の個数: 64

約数和(自身を含む): 60480000

約数和(自身を除く): 34798360

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 139, 149, 155, 248, 278, 298, 310, 556, 596, 620, 695, 745, 1112, 1192, 1240, 1390, 1490, 2780, 2980, 4309, 4619, 5560, 5960, 8618, 9238, 17236, 18476, 20711, 21545, 23095, 34472, 36952, 41422, 43090, 46190, 82844, 86180, 92380, 103555, 165688, 172360, 184760, 207110, 414220, 642041, 828440, 1284082, 2568164, 3210205, 5136328, 6420410, 12840820, 25681640]

約数ペア:

[(1, 25681640), (2, 12840820), (4, 6420410), (5, 5136328), (8, 3210205), (10, 2568164), (20, 1284082), (31, 828440), (40, 642041), (62, 414220), (124, 207110), (139, 184760), (149, 172360), (155, 165688), (248, 103555), (278, 92380), (298, 86180), (310, 82844), (556, 46190), (596, 43090), (620, 41422), (695, 36952), (745, 34472), (1112, 23095), (1192, 21545), (1240, 20711), (1390, 18476), (1490, 17236), (2780, 9238), (2980, 8618), (4309, 5960), (4619, 5560)]