21007812

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{449}}^1\times {\mathrm{557}}^1$

素因数の和:1020

約数の個数: 48

約数和(自身を含む): 56246400

約数和(自身を除く): 35238588

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 449, 557, 898, 1114, 1347, 1671, 1796, 2228, 2694, 3143, 3342, 3899, 5388, 6286, 6684, 7798, 9429, 11697, 12572, 15596, 18858, 23394, 37716, 46788, 250093, 500186, 750279, 1000372, 1500558, 1750651, 3001116, 3501302, 5251953, 7002604, 10503906, 21007812]

約数ペア:

[(1, 21007812), (2, 10503906), (3, 7002604), (4, 5251953), (6, 3501302), (7, 3001116), (12, 1750651), (14, 1500558), (21, 1000372), (28, 750279), (42, 500186), (84, 250093), (449, 46788), (557, 37716), (898, 23394), (1114, 18858), (1347, 15596), (1671, 12572), (1796, 11697), (2228, 9429), (2694, 7798), (3143, 6684), (3342, 6286), (3899, 5388)]