20802580

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{1103}}^1$

素因数の和:1176

約数の個数: 48

約数和(自身を含む): 46738944

約数和(自身を除く): 25936364

約数列:

[1, 2, 4, 5, 10, 20, 23, 41, 46, 82, 92, 115, 164, 205, 230, 410, 460, 820, 943, 1103, 1886, 2206, 3772, 4412, 4715, 5515, 9430, 11030, 18860, 22060, 25369, 45223, 50738, 90446, 101476, 126845, 180892, 226115, 253690, 452230, 507380, 904460, 1040129, 2080258, 4160516, 5200645, 10401290, 20802580]

約数ペア:

[(1, 20802580), (2, 10401290), (4, 5200645), (5, 4160516), (10, 2080258), (20, 1040129), (23, 904460), (41, 507380), (46, 452230), (82, 253690), (92, 226115), (115, 180892), (164, 126845), (205, 101476), (230, 90446), (410, 50738), (460, 45223), (820, 25369), (943, 22060), (1103, 18860), (1886, 11030), (2206, 9430), (3772, 5515), (4412, 4715)]