20287437440

素因数分解:

$2^7\times 5^1\times {\mathrm{37}}^1\times {\mathrm{856733}}^1$

素因数の和:856789

約数の個数: 64

約数和(自身を含む): 49810514760

約数和(自身を除く): 29523077320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 296, 320, 370, 592, 640, 740, 1184, 1480, 2368, 2960, 4736, 5920, 11840, 23680, 856733, 1713466, 3426932, 4283665, 6853864, 8567330, 13707728, 17134660, 27415456, 31699121, 34269320, 54830912, 63398242, 68538640, 109661824, 126796484, 137077280, 158495605, 253592968, 274154560, 316991210, 507185936, 548309120, 633982420, 1014371872, 1267964840, 2028743744, 2535929680, 4057487488, 5071859360, 10143718720, 20287437440]

約数ペア:

[(1, 20287437440), (2, 10143718720), (4, 5071859360), (5, 4057487488), (8, 2535929680), (10, 2028743744), (16, 1267964840), (20, 1014371872), (32, 633982420), (37, 548309120), (40, 507185936), (64, 316991210), (74, 274154560), (80, 253592968), (128, 158495605), (148, 137077280), (160, 126796484), (185, 109661824), (296, 68538640), (320, 63398242), (370, 54830912), (592, 34269320), (640, 31699121), (740, 27415456), (1184, 17134660), (1480, 13707728), (2368, 8567330), (2960, 6853864), (4736, 4283665), (5920, 3426932), (11840, 1713466), (23680, 856733)]