20723456

素因数分解:

$2^8\times {\mathrm{13}}^2\times {\mathrm{479}}^1$

素因数の和:521

約数の個数: 54

約数和(自身を含む): 44886240

約数和(自身を除く): 24162784

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 169, 208, 256, 338, 416, 479, 676, 832, 958, 1352, 1664, 1916, 2704, 3328, 3832, 5408, 6227, 7664, 10816, 12454, 15328, 21632, 24908, 30656, 43264, 49816, 61312, 80951, 99632, 122624, 161902, 199264, 323804, 398528, 647608, 797056, 1295216, 1594112, 2590432, 5180864, 10361728, 20723456]

約数ペア:

[(1, 20723456), (2, 10361728), (4, 5180864), (8, 2590432), (13, 1594112), (16, 1295216), (26, 797056), (32, 647608), (52, 398528), (64, 323804), (104, 199264), (128, 161902), (169, 122624), (208, 99632), (256, 80951), (338, 61312), (416, 49816), (479, 43264), (676, 30656), (832, 24908), (958, 21632), (1352, 15328), (1664, 12454), (1916, 10816), (2704, 7664), (3328, 6227), (3832, 5408)]