20913375

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:313

約数の個数: 64

約数和(自身を含む): 41213952

約数和(自身を除く): 20300577

約数列:

[1, 3, 5, 7, 15, 21, 25, 31, 35, 75, 93, 105, 125, 155, 175, 217, 257, 375, 465, 525, 651, 771, 775, 875, 1085, 1285, 1799, 2325, 2625, 3255, 3855, 3875, 5397, 5425, 6425, 7967, 8995, 11625, 16275, 19275, 23901, 26985, 27125, 32125, 39835, 44975, 55769, 81375, 96375, 119505, 134925, 167307, 199175, 224875, 278845, 597525, 674625, 836535, 995875, 1394225, 2987625, 4182675, 6971125, 20913375]

約数ペア:

[(1, 20913375), (3, 6971125), (5, 4182675), (7, 2987625), (15, 1394225), (21, 995875), (25, 836535), (31, 674625), (35, 597525), (75, 278845), (93, 224875), (105, 199175), (125, 167307), (155, 134925), (175, 119505), (217, 96375), (257, 81375), (375, 55769), (465, 44975), (525, 39835), (651, 32125), (771, 27125), (775, 26985), (875, 23901), (1085, 19275), (1285, 16275), (1799, 11625), (2325, 8995), (2625, 7967), (3255, 6425), (3855, 5425), (3875, 5397)]