208327640

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1\times {\mathrm{421}}^1$

素因数の和:660

約数の個数: 64

約数和(自身を含む): 478548000

約数和(自身を除く): 270220360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 139, 178, 278, 356, 421, 445, 556, 695, 712, 842, 890, 1112, 1390, 1684, 1780, 2105, 2780, 3368, 3560, 4210, 5560, 8420, 12371, 16840, 24742, 37469, 49484, 58519, 61855, 74938, 98968, 117038, 123710, 149876, 187345, 234076, 247420, 292595, 299752, 374690, 468152, 494840, 585190, 749380, 1170380, 1498760, 2340760, 5208191, 10416382, 20832764, 26040955, 41665528, 52081910, 104163820, 208327640]

約数ペア:

[(1, 208327640), (2, 104163820), (4, 52081910), (5, 41665528), (8, 26040955), (10, 20832764), (20, 10416382), (40, 5208191), (89, 2340760), (139, 1498760), (178, 1170380), (278, 749380), (356, 585190), (421, 494840), (445, 468152), (556, 374690), (695, 299752), (712, 292595), (842, 247420), (890, 234076), (1112, 187345), (1390, 149876), (1684, 123710), (1780, 117038), (2105, 98968), (2780, 74938), (3368, 61855), (3560, 58519), (4210, 49484), (5560, 37469), (8420, 24742), (12371, 16840)]