21428589

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1481}}^1$

素因数の和:1557

約数の個数: 32

約数和(自身を含む): 35852544

約数和(自身を除く): 14423955

約数列:

[1, 3, 7, 13, 21, 39, 53, 91, 159, 273, 371, 689, 1113, 1481, 2067, 4443, 4823, 10367, 14469, 19253, 31101, 57759, 78493, 134771, 235479, 404313, 549451, 1020409, 1648353, 3061227, 7142863, 21428589]

約数ペア:

[(1, 21428589), (3, 7142863), (7, 3061227), (13, 1648353), (21, 1020409), (39, 549451), (53, 404313), (91, 235479), (159, 134771), (273, 78493), (371, 57759), (689, 31101), (1113, 19253), (1481, 14469), (2067, 10367), (4443, 4823)]