720239620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:349

約数の個数: 96

約数和(自身を含む): 1600300800

約数和(自身を除く): 880061180

約数列:

[1, 2, 4, 5, 10, 20, 41, 71, 82, 89, 139, 142, 164, 178, 205, 278, 284, 355, 356, 410, 445, 556, 695, 710, 820, 890, 1390, 1420, 1780, 2780, 2911, 3649, 5699, 5822, 6319, 7298, 9869, 11398, 11644, 12371, 12638, 14555, 14596, 18245, 19738, 22796, 24742, 25276, 28495, 29110, 31595, 36490, 39476, 49345, 49484, 56990, 58220, 61855, 63190, 72980, 98690, 113980, 123710, 126380, 197380, 247420, 259079, 404629, 507211, 518158, 809258, 878341, 1014422, 1036316, 1295395, 1618516, 1756682, 2023145, 2028844, 2536055, 2590790, 3513364, 4046290, 4391705, 5072110, 5181580, 8092580, 8783410, 10144220, 17566820, 36011981, 72023962, 144047924, 180059905, 360119810, 720239620]

約数ペア:

[(1, 720239620), (2, 360119810), (4, 180059905), (5, 144047924), (10, 72023962), (20, 36011981), (41, 17566820), (71, 10144220), (82, 8783410), (89, 8092580), (139, 5181580), (142, 5072110), (164, 4391705), (178, 4046290), (205, 3513364), (278, 2590790), (284, 2536055), (355, 2028844), (356, 2023145), (410, 1756682), (445, 1618516), (556, 1295395), (695, 1036316), (710, 1014422), (820, 878341), (890, 809258), (1390, 518158), (1420, 507211), (1780, 404629), (2780, 259079), (2911, 247420), (3649, 197380), (5699, 126380), (5822, 123710), (6319, 113980), (7298, 98690), (9869, 72980), (11398, 63190), (11644, 61855), (12371, 58220), (12638, 56990), (14555, 49484), (14596, 49345), (18245, 39476), (19738, 36490), (22796, 31595), (24742, 29110), (25276, 28495)]