20985388

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{2039}}^1$

素因数の和:2157

約数の個数: 24

約数和(自身を含む): 38384640

約数和(自身を除く): 17399252

約数列:

[1, 2, 4, 31, 62, 83, 124, 166, 332, 2039, 2573, 4078, 5146, 8156, 10292, 63209, 126418, 169237, 252836, 338474, 676948, 5246347, 10492694, 20985388]

約数ペア:

[(1, 20985388), (2, 10492694), (4, 5246347), (31, 676948), (62, 338474), (83, 252836), (124, 169237), (166, 126418), (332, 63209), (2039, 10292), (2573, 8156), (4078, 5146)]