20404839

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1823}}^1$

素因数の和:1887

約数の個数: 32

約数和(自身を含む): 34320384

約数和(自身を除く): 13915545

約数列:

[1, 3, 7, 13, 21, 39, 41, 91, 123, 273, 287, 533, 861, 1599, 1823, 3731, 5469, 11193, 12761, 23699, 38283, 71097, 74743, 165893, 224229, 497679, 523201, 971659, 1569603, 2914977, 6801613, 20404839]

約数ペア:

[(1, 20404839), (3, 6801613), (7, 2914977), (13, 1569603), (21, 971659), (39, 523201), (41, 497679), (91, 224229), (123, 165893), (273, 74743), (287, 71097), (533, 38283), (861, 23699), (1599, 12761), (1823, 11193), (3731, 5469)]