19180720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{18443}}^1$

素因数の和:18469

約数の個数: 40

約数和(自身を含む): 48028176

約数和(自身を除く): 28847456

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 18443, 36886, 73772, 92215, 147544, 184430, 239759, 295088, 368860, 479518, 737720, 959036, 1198795, 1475440, 1918072, 2397590, 3836144, 4795180, 9590360, 19180720]

約数ペア:

[(1, 19180720), (2, 9590360), (4, 4795180), (5, 3836144), (8, 2397590), (10, 1918072), (13, 1475440), (16, 1198795), (20, 959036), (26, 737720), (40, 479518), (52, 368860), (65, 295088), (80, 239759), (104, 184430), (130, 147544), (208, 92215), (260, 73772), (520, 36886), (1040, 18443)]