21145131

素因数分解:

$3^5\times 7^1\times {\mathrm{31}}^1\times {\mathrm{401}}^1$

素因数の和:454

約数の個数: 48

約数和(自身を含む): 37459968

約数和(自身を除く): 16314837

約数列:

[1, 3, 7, 9, 21, 27, 31, 63, 81, 93, 189, 217, 243, 279, 401, 567, 651, 837, 1203, 1701, 1953, 2511, 2807, 3609, 5859, 7533, 8421, 10827, 12431, 17577, 25263, 32481, 37293, 52731, 75789, 87017, 97443, 111879, 227367, 261051, 335637, 682101, 783153, 1006911, 2349459, 3020733, 7048377, 21145131]

約数ペア:

[(1, 21145131), (3, 7048377), (7, 3020733), (9, 2349459), (21, 1006911), (27, 783153), (31, 682101), (63, 335637), (81, 261051), (93, 227367), (189, 111879), (217, 97443), (243, 87017), (279, 75789), (401, 52731), (567, 37293), (651, 32481), (837, 25263), (1203, 17577), (1701, 12431), (1953, 10827), (2511, 8421), (2807, 7533), (3609, 5859)]