21001725

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{3011}}^1$

素因数の和:3058

約数の個数: 36

約数和(自身を含む): 38842752

約数和(自身を除く): 17841027

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1395, 2325, 3011, 6975, 9033, 15055, 27099, 45165, 75275, 93341, 135495, 225825, 280023, 466705, 677475, 840069, 1400115, 2333525, 4200345, 7000575, 21001725]

約数ペア:

[(1, 21001725), (3, 7000575), (5, 4200345), (9, 2333525), (15, 1400115), (25, 840069), (31, 677475), (45, 466705), (75, 280023), (93, 225825), (155, 135495), (225, 93341), (279, 75275), (465, 45165), (775, 27099), (1395, 15055), (2325, 9033), (3011, 6975)]