21830276

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^2$

素因数の和:248

約数の個数: 36

約数和(自身を含む): 42394212

約数和(自身を除く): 20563936

約数列:

[1, 2, 4, 13, 26, 52, 53, 89, 106, 178, 212, 356, 689, 1157, 1378, 2314, 2756, 4628, 4717, 7921, 9434, 15842, 18868, 31684, 61321, 102973, 122642, 205946, 245284, 411892, 419813, 839626, 1679252, 5457569, 10915138, 21830276]

約数ペア:

[(1, 21830276), (2, 10915138), (4, 5457569), (13, 1679252), (26, 839626), (52, 419813), (53, 411892), (89, 245284), (106, 205946), (178, 122642), (212, 102973), (356, 61321), (689, 31684), (1157, 18868), (1378, 15842), (2314, 9434), (2756, 7921), (4628, 4717)]