661625560

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{3581}}^1$

素因数の和:3772

約数の個数: 64

約数和(自身を含む): 1547424000

約数和(自身を除く): 885798440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 149, 155, 248, 298, 310, 596, 620, 745, 1192, 1240, 1490, 2980, 3581, 4619, 5960, 7162, 9238, 14324, 17905, 18476, 23095, 28648, 35810, 36952, 46190, 71620, 92380, 111011, 143240, 184760, 222022, 444044, 533569, 555055, 888088, 1067138, 1110110, 2134276, 2220220, 2667845, 4268552, 4440440, 5335690, 10671380, 16540639, 21342760, 33081278, 66162556, 82703195, 132325112, 165406390, 330812780, 661625560]

約数ペア:

[(1, 661625560), (2, 330812780), (4, 165406390), (5, 132325112), (8, 82703195), (10, 66162556), (20, 33081278), (31, 21342760), (40, 16540639), (62, 10671380), (124, 5335690), (149, 4440440), (155, 4268552), (248, 2667845), (298, 2220220), (310, 2134276), (596, 1110110), (620, 1067138), (745, 888088), (1192, 555055), (1240, 533569), (1490, 444044), (2980, 222022), (3581, 184760), (4619, 143240), (5960, 111011), (7162, 92380), (9238, 71620), (14324, 46190), (17905, 36952), (18476, 35810), (23095, 28648)]