21384520

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14449}}^1$

素因数の和:14497

約数の個数: 32

約数和(自身を含む): 49419000

約数和(自身を除く): 28034480

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14449, 28898, 57796, 72245, 115592, 144490, 288980, 534613, 577960, 1069226, 2138452, 2673065, 4276904, 5346130, 10692260, 21384520]

約数ペア:

[(1, 21384520), (2, 10692260), (4, 5346130), (5, 4276904), (8, 2673065), (10, 2138452), (20, 1069226), (37, 577960), (40, 534613), (74, 288980), (148, 144490), (185, 115592), (296, 72245), (370, 57796), (740, 28898), (1480, 14449)]