21000369680

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8467891}}^1$

素因数の和:8467935

約数の個数: 40

約数和(自身を含む): 50400893184

約数和(自身を除く): 29400523504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8467891, 16935782, 33871564, 42339455, 67743128, 84678910, 135486256, 169357820, 262504621, 338715640, 525009242, 677431280, 1050018484, 1312523105, 2100036968, 2625046210, 4200073936, 5250092420, 10500184840, 21000369680]

約数ペア:

[(1, 21000369680), (2, 10500184840), (4, 5250092420), (5, 4200073936), (8, 2625046210), (10, 2100036968), (16, 1312523105), (20, 1050018484), (31, 677431280), (40, 525009242), (62, 338715640), (80, 262504621), (124, 169357820), (155, 135486256), (248, 84678910), (310, 67743128), (496, 42339455), (620, 33871564), (1240, 16935782), (2480, 8467891)]