128807920

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{229}}^1$

素因数の和:410

約数の個数: 80

約数和(自身を含む): 308016000

約数和(自身を除く): 179208080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 89, 158, 178, 229, 316, 356, 395, 445, 458, 632, 712, 790, 890, 916, 1145, 1264, 1424, 1580, 1780, 1832, 2290, 3160, 3560, 3664, 4580, 6320, 7031, 7120, 9160, 14062, 18091, 18320, 20381, 28124, 35155, 36182, 40762, 56248, 70310, 72364, 81524, 90455, 101905, 112496, 140620, 144728, 163048, 180910, 203810, 281240, 289456, 326096, 361820, 407620, 562480, 723640, 815240, 1447280, 1610099, 1630480, 3220198, 6440396, 8050495, 12880792, 16100990, 25761584, 32201980, 64403960, 128807920]

約数ペア:

[(1, 128807920), (2, 64403960), (4, 32201980), (5, 25761584), (8, 16100990), (10, 12880792), (16, 8050495), (20, 6440396), (40, 3220198), (79, 1630480), (80, 1610099), (89, 1447280), (158, 815240), (178, 723640), (229, 562480), (316, 407620), (356, 361820), (395, 326096), (445, 289456), (458, 281240), (632, 203810), (712, 180910), (790, 163048), (890, 144728), (916, 140620), (1145, 112496), (1264, 101905), (1424, 90455), (1580, 81524), (1780, 72364), (1832, 70310), (2290, 56248), (3160, 40762), (3560, 36182), (3664, 35155), (4580, 28124), (6320, 20381), (7031, 18320), (7120, 18091), (9160, 14062)]