21418384

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{89}}^2$

素因数の和:212

約数の個数: 45

約数和(自身を含む): 45446403

約数和(自身を除く): 24028019

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 89, 104, 169, 178, 208, 338, 356, 676, 712, 1157, 1352, 1424, 2314, 2704, 4628, 7921, 9256, 15041, 15842, 18512, 30082, 31684, 60164, 63368, 102973, 120328, 126736, 205946, 240656, 411892, 823784, 1338649, 1647568, 2677298, 5354596, 10709192, 21418384]

約数ペア:

[(1, 21418384), (2, 10709192), (4, 5354596), (8, 2677298), (13, 1647568), (16, 1338649), (26, 823784), (52, 411892), (89, 240656), (104, 205946), (169, 126736), (178, 120328), (208, 102973), (338, 63368), (356, 60164), (676, 31684), (712, 30082), (1157, 18512), (1352, 15842), (1424, 15041), (2314, 9256), (2704, 7921)]