20849325

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{263}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 39806976

約数和(自身を除く): 18957651

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 151, 175, 263, 453, 525, 755, 789, 1057, 1315, 1841, 2265, 3171, 3775, 3945, 5285, 5523, 6575, 9205, 11325, 15855, 19725, 26425, 27615, 39713, 46025, 79275, 119139, 138075, 198565, 277991, 595695, 833973, 992825, 1389955, 2978475, 4169865, 6949775, 20849325]

約数ペア:

[(1, 20849325), (3, 6949775), (5, 4169865), (7, 2978475), (15, 1389955), (21, 992825), (25, 833973), (35, 595695), (75, 277991), (105, 198565), (151, 138075), (175, 119139), (263, 79275), (453, 46025), (525, 39713), (755, 27615), (789, 26425), (1057, 19725), (1315, 15855), (1841, 11325), (2265, 9205), (3171, 6575), (3775, 5523), (3945, 5285)]