638001880

素因数分解:

$2^3\times 5^1\times {\mathrm{2909}}^1\times {\mathrm{5483}}^1$

素因数の和:8403

約数の個数: 32

約数和(自身を含む): 1436259600

約数和(自身を除く): 798257720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2909, 5483, 5818, 10966, 11636, 14545, 21932, 23272, 27415, 29090, 43864, 54830, 58180, 109660, 116360, 219320, 15950047, 31900094, 63800188, 79750235, 127600376, 159500470, 319000940, 638001880]

約数ペア:

[(1, 638001880), (2, 319000940), (4, 159500470), (5, 127600376), (8, 79750235), (10, 63800188), (20, 31900094), (40, 15950047), (2909, 219320), (5483, 116360), (5818, 109660), (10966, 58180), (11636, 54830), (14545, 43864), (21932, 29090), (23272, 27415)]