21154965

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{691}}^1$

素因数の和:869

約数の個数: 32

約数和(自身を含む): 36736896

約数和(自身を除く): 15581931

約数列:

[1, 3, 5, 13, 15, 39, 65, 157, 195, 471, 691, 785, 2041, 2073, 2355, 3455, 6123, 8983, 10205, 10365, 26949, 30615, 44915, 108487, 134745, 325461, 542435, 1410331, 1627305, 4230993, 7051655, 21154965]

約数ペア:

[(1, 21154965), (3, 7051655), (5, 4230993), (13, 1627305), (15, 1410331), (39, 542435), (65, 325461), (157, 134745), (195, 108487), (471, 44915), (691, 30615), (785, 26949), (2041, 10365), (2073, 10205), (2355, 8983), (3455, 6123)]