21388960

素因数分解:

$2^5\times 5^1\times {\mathrm{37}}^1\times {\mathrm{3613}}^1$

素因数の和:3665

約数の個数: 48

約数和(自身を含む): 51911496

約数和(自身を除く): 30522536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 74, 80, 148, 160, 185, 296, 370, 592, 740, 1184, 1480, 2960, 3613, 5920, 7226, 14452, 18065, 28904, 36130, 57808, 72260, 115616, 133681, 144520, 267362, 289040, 534724, 578080, 668405, 1069448, 1336810, 2138896, 2673620, 4277792, 5347240, 10694480, 21388960]

約数ペア:

[(1, 21388960), (2, 10694480), (4, 5347240), (5, 4277792), (8, 2673620), (10, 2138896), (16, 1336810), (20, 1069448), (32, 668405), (37, 578080), (40, 534724), (74, 289040), (80, 267362), (148, 144520), (160, 133681), (185, 115616), (296, 72260), (370, 57808), (592, 36130), (740, 28904), (1184, 18065), (1480, 14452), (2960, 7226), (3613, 5920)]