21262125

素因数分解:

$3^1\times 5^3\times {\mathrm{31}}^2\times {\mathrm{59}}^1$

素因数の和:139

約数の個数: 48

約数和(自身を含む): 37177920

約数和(自身を除く): 15915795

約数列:

[1, 3, 5, 15, 25, 31, 59, 75, 93, 125, 155, 177, 295, 375, 465, 775, 885, 961, 1475, 1829, 2325, 2883, 3875, 4425, 4805, 5487, 7375, 9145, 11625, 14415, 22125, 24025, 27435, 45725, 56699, 72075, 120125, 137175, 170097, 228625, 283495, 360375, 685875, 850485, 1417475, 4252425, 7087375, 21262125]

約数ペア:

[(1, 21262125), (3, 7087375), (5, 4252425), (15, 1417475), (25, 850485), (31, 685875), (59, 360375), (75, 283495), (93, 228625), (125, 170097), (155, 137175), (177, 120125), (295, 72075), (375, 56699), (465, 45725), (775, 27435), (885, 24025), (961, 22125), (1475, 14415), (1829, 11625), (2325, 9145), (2883, 7375), (3875, 5487), (4425, 4805)]