21138735

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4363}}^1$

素因数の和:4407

約数の個数: 32

約数和(自身を含む): 37704960

約数和(自身を除く): 16566225

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 255, 285, 323, 969, 1615, 4363, 4845, 13089, 21815, 65445, 74171, 82897, 222513, 248691, 370855, 414485, 1112565, 1243455, 1409249, 4227747, 7046245, 21138735]

約数ペア:

[(1, 21138735), (3, 7046245), (5, 4227747), (15, 1409249), (17, 1243455), (19, 1112565), (51, 414485), (57, 370855), (85, 248691), (95, 222513), (255, 82897), (285, 74171), (323, 65445), (969, 21815), (1615, 13089), (4363, 4845)]