21503080

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{1283}}^1$

素因数の和:1713

約数の個数: 32

約数和(自身を含む): 48535200

約数和(自身を除く): 27032120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1283, 1676, 2095, 2566, 3352, 4190, 5132, 6415, 8380, 10264, 12830, 16760, 25660, 51320, 537577, 1075154, 2150308, 2687885, 4300616, 5375770, 10751540, 21503080]

約数ペア:

[(1, 21503080), (2, 10751540), (4, 5375770), (5, 4300616), (8, 2687885), (10, 2150308), (20, 1075154), (40, 537577), (419, 51320), (838, 25660), (1283, 16760), (1676, 12830), (2095, 10264), (2566, 8380), (3352, 6415), (4190, 5132)]