21620876

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{347}}^1\times {\mathrm{421}}^1$

素因数の和:809

約数の個数: 24

約数和(自身を含む): 39063696

約数和(自身を除く): 17442820

約数列:

[1, 2, 4, 37, 74, 148, 347, 421, 694, 842, 1388, 1684, 12839, 15577, 25678, 31154, 51356, 62308, 146087, 292174, 584348, 5405219, 10810438, 21620876]

約数ペア:

[(1, 21620876), (2, 10810438), (4, 5405219), (37, 584348), (74, 292174), (148, 146087), (347, 62308), (421, 51356), (694, 31154), (842, 25678), (1388, 15577), (1684, 12839)]