81012920

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{827}}^1$

素因数の和:948

約数の個数: 64

約数和(自身を含む): 190771200

約数和(自身を除く): 109758280

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 79, 124, 155, 158, 248, 310, 316, 395, 620, 632, 790, 827, 1240, 1580, 1654, 2449, 3160, 3308, 4135, 4898, 6616, 8270, 9796, 12245, 16540, 19592, 24490, 25637, 33080, 48980, 51274, 65333, 97960, 102548, 128185, 130666, 205096, 256370, 261332, 326665, 512740, 522664, 653330, 1025480, 1306660, 2025323, 2613320, 4050646, 8101292, 10126615, 16202584, 20253230, 40506460, 81012920]

約数ペア:

[(1, 81012920), (2, 40506460), (4, 20253230), (5, 16202584), (8, 10126615), (10, 8101292), (20, 4050646), (31, 2613320), (40, 2025323), (62, 1306660), (79, 1025480), (124, 653330), (155, 522664), (158, 512740), (248, 326665), (310, 261332), (316, 256370), (395, 205096), (620, 130666), (632, 128185), (790, 102548), (827, 97960), (1240, 65333), (1580, 51274), (1654, 48980), (2449, 33080), (3160, 25637), (3308, 24490), (4135, 19592), (4898, 16540), (6616, 12245), (8270, 9796)]