21251025

素因数分解:

$3^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{1657}}^1$

素因数の和:1695

約数の個数: 48

約数和(自身を含む): 41118400

約数和(自身を除く): 19867375

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 95, 135, 171, 225, 285, 475, 513, 675, 855, 1425, 1657, 2565, 4275, 4971, 8285, 12825, 14913, 24855, 31483, 41425, 44739, 74565, 94449, 124275, 157415, 223695, 283347, 372825, 472245, 787075, 850041, 1118475, 1416735, 2361225, 4250205, 7083675, 21251025]

約数ペア:

[(1, 21251025), (3, 7083675), (5, 4250205), (9, 2361225), (15, 1416735), (19, 1118475), (25, 850041), (27, 787075), (45, 472245), (57, 372825), (75, 283347), (95, 223695), (135, 157415), (171, 124275), (225, 94449), (285, 74565), (475, 44739), (513, 41425), (675, 31483), (855, 24855), (1425, 14913), (1657, 12825), (2565, 8285), (4275, 4971)]