20909590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{3923}}^1$

素因数の和:3984

約数の個数: 32

約数和(自身を含む): 41531616

約数和(自身を除く): 20622026

約数列:

[1, 2, 5, 10, 13, 26, 41, 65, 82, 130, 205, 410, 533, 1066, 2665, 3923, 5330, 7846, 19615, 39230, 50999, 101998, 160843, 254995, 321686, 509990, 804215, 1608430, 2090959, 4181918, 10454795, 20909590]

約数ペア:

[(1, 20909590), (2, 10454795), (5, 4181918), (10, 2090959), (13, 1608430), (26, 804215), (41, 509990), (65, 321686), (82, 254995), (130, 160843), (205, 101998), (410, 50999), (533, 39230), (1066, 19615), (2665, 7846), (3923, 5330)]