21371553

素因数分解:

$3^3\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1549}}^1$

素因数の和:1638

約数の個数: 32

約数和(自身を含む): 36704000

約数和(自身を除く): 15332447

約数列:

[1, 3, 7, 9, 21, 27, 63, 73, 189, 219, 511, 657, 1533, 1549, 1971, 4599, 4647, 10843, 13797, 13941, 32529, 41823, 97587, 113077, 292761, 339231, 791539, 1017693, 2374617, 3053079, 7123851, 21371553]

約数ペア:

[(1, 21371553), (3, 7123851), (7, 3053079), (9, 2374617), (21, 1017693), (27, 791539), (63, 339231), (73, 292761), (189, 113077), (219, 97587), (511, 41823), (657, 32529), (1533, 13941), (1549, 13797), (1971, 10843), (4599, 4647)]