28928575

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{167}}^1$

素因数の和:244

約数の個数: 36

約数和(自身を含む): 40028688

約数和(自身を除く): 11100113

約数列:

[1, 5, 13, 25, 41, 65, 167, 169, 205, 325, 533, 835, 845, 1025, 2171, 2665, 4175, 4225, 6847, 6929, 10855, 13325, 28223, 34235, 34645, 54275, 89011, 141115, 171175, 173225, 445055, 705575, 1157143, 2225275, 5785715, 28928575]

約数ペア:

[(1, 28928575), (5, 5785715), (13, 2225275), (25, 1157143), (41, 705575), (65, 445055), (167, 173225), (169, 171175), (205, 141115), (325, 89011), (533, 54275), (835, 34645), (845, 34235), (1025, 28223), (2171, 13325), (2665, 10855), (4175, 6929), (4225, 6847)]