20743840

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9973}}^1$

素因数の和:10001

約数の個数: 48

約数和(自身を含む): 52782408

約数和(自身を除く): 32038568

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9973, 19946, 39892, 49865, 79784, 99730, 129649, 159568, 199460, 259298, 319136, 398920, 518596, 648245, 797840, 1037192, 1296490, 1595680, 2074384, 2592980, 4148768, 5185960, 10371920, 20743840]

約数ペア:

[(1, 20743840), (2, 10371920), (4, 5185960), (5, 4148768), (8, 2592980), (10, 2074384), (13, 1595680), (16, 1296490), (20, 1037192), (26, 797840), (32, 648245), (40, 518596), (52, 398920), (65, 319136), (80, 259298), (104, 199460), (130, 159568), (160, 129649), (208, 99730), (260, 79784), (416, 49865), (520, 39892), (1040, 19946), (2080, 9973)]