21644675

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:192

約数の個数: 36

約数和(自身を含む): 29953440

約数和(自身を除く): 8308765

約数列:

[1, 5, 13, 25, 47, 65, 109, 169, 235, 325, 545, 611, 845, 1175, 1417, 2725, 3055, 4225, 5123, 7085, 7943, 15275, 18421, 25615, 35425, 39715, 66599, 92105, 128075, 198575, 332995, 460525, 865787, 1664975, 4328935, 21644675]

約数ペア:

[(1, 21644675), (5, 4328935), (13, 1664975), (25, 865787), (47, 460525), (65, 332995), (109, 198575), (169, 128075), (235, 92105), (325, 66599), (545, 39715), (611, 35425), (845, 25615), (1175, 18421), (1417, 15275), (2725, 7943), (3055, 7085), (4225, 5123)]