20509839

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{113}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 35473152

約数和(自身を除く): 14963313

約数列:

[1, 3, 7, 9, 21, 43, 63, 67, 113, 129, 201, 301, 339, 387, 469, 603, 791, 903, 1017, 1407, 2373, 2709, 2881, 4221, 4859, 7119, 7571, 8643, 14577, 20167, 22713, 25929, 34013, 43731, 52997, 60501, 68139, 102039, 158991, 181503, 306117, 325553, 476973, 976659, 2278871, 2929977, 6836613, 20509839]

約数ペア:

[(1, 20509839), (3, 6836613), (7, 2929977), (9, 2278871), (21, 976659), (43, 476973), (63, 325553), (67, 306117), (113, 181503), (129, 158991), (201, 102039), (301, 68139), (339, 60501), (387, 52997), (469, 43731), (603, 34013), (791, 25929), (903, 22713), (1017, 20167), (1407, 14577), (2373, 8643), (2709, 7571), (2881, 7119), (4221, 4859)]