21908475

素因数分解:

$3^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{349}}^1$

素因数の和:402

約数の個数: 60

約数和(自身を含む): 42011200

約数和(自身を除く): 20102725

約数列:

[1, 3, 5, 9, 15, 25, 27, 31, 45, 75, 81, 93, 135, 155, 225, 279, 349, 405, 465, 675, 775, 837, 1047, 1395, 1745, 2025, 2325, 2511, 3141, 4185, 5235, 6975, 8725, 9423, 10819, 12555, 15705, 20925, 26175, 28269, 32457, 47115, 54095, 62775, 78525, 97371, 141345, 162285, 235575, 270475, 292113, 486855, 706725, 811425, 876339, 1460565, 2434275, 4381695, 7302825, 21908475]

約数ペア:

[(1, 21908475), (3, 7302825), (5, 4381695), (9, 2434275), (15, 1460565), (25, 876339), (27, 811425), (31, 706725), (45, 486855), (75, 292113), (81, 270475), (93, 235575), (135, 162285), (155, 141345), (225, 97371), (279, 78525), (349, 62775), (405, 54095), (465, 47115), (675, 32457), (775, 28269), (837, 26175), (1047, 20925), (1395, 15705), (1745, 12555), (2025, 10819), (2325, 9423), (2511, 8725), (3141, 6975), (4185, 5235)]