21553360

素因数分解:

$2^4\times 5^1\times {\mathrm{419}}^1\times {\mathrm{643}}^1$

素因数の和:1075

約数の個数: 40

約数和(自身を含む): 50309280

約数和(自身を除く): 28755920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 419, 643, 838, 1286, 1676, 2095, 2572, 3215, 3352, 4190, 5144, 6430, 6704, 8380, 10288, 12860, 16760, 25720, 33520, 51440, 269417, 538834, 1077668, 1347085, 2155336, 2694170, 4310672, 5388340, 10776680, 21553360]

約数ペア:

[(1, 21553360), (2, 10776680), (4, 5388340), (5, 4310672), (8, 2694170), (10, 2155336), (16, 1347085), (20, 1077668), (40, 538834), (80, 269417), (419, 51440), (643, 33520), (838, 25720), (1286, 16760), (1676, 12860), (2095, 10288), (2572, 8380), (3215, 6704), (3352, 6430), (4190, 5144)]