81022840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:261

約数の個数: 96

約数和(自身を含む): 199704960

約数和(自身を除く): 118682120

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 31, 38, 40, 62, 76, 95, 124, 152, 155, 181, 190, 248, 310, 361, 362, 380, 589, 620, 722, 724, 760, 905, 1178, 1240, 1444, 1448, 1805, 1810, 2356, 2888, 2945, 3439, 3610, 3620, 4712, 5611, 5890, 6878, 7220, 7240, 11191, 11222, 11780, 13756, 14440, 17195, 22382, 22444, 23560, 27512, 28055, 34390, 44764, 44888, 55955, 56110, 65341, 68780, 89528, 106609, 111910, 112220, 130682, 137560, 213218, 223820, 224440, 261364, 326705, 426436, 447640, 522728, 533045, 653410, 852872, 1066090, 1306820, 2025571, 2132180, 2613640, 4051142, 4264360, 8102284, 10127855, 16204568, 20255710, 40511420, 81022840]

約数ペア:

[(1, 81022840), (2, 40511420), (4, 20255710), (5, 16204568), (8, 10127855), (10, 8102284), (19, 4264360), (20, 4051142), (31, 2613640), (38, 2132180), (40, 2025571), (62, 1306820), (76, 1066090), (95, 852872), (124, 653410), (152, 533045), (155, 522728), (181, 447640), (190, 426436), (248, 326705), (310, 261364), (361, 224440), (362, 223820), (380, 213218), (589, 137560), (620, 130682), (722, 112220), (724, 111910), (760, 106609), (905, 89528), (1178, 68780), (1240, 65341), (1444, 56110), (1448, 55955), (1805, 44888), (1810, 44764), (2356, 34390), (2888, 28055), (2945, 27512), (3439, 23560), (3610, 22444), (3620, 22382), (4712, 17195), (5611, 14440), (5890, 13756), (6878, 11780), (7220, 11222), (7240, 11191)]