21130840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17041}}^1$

素因数の和:17083

約数の個数: 32

約数和(自身を含む): 49080960

約数和(自身を除く): 27950120

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17041, 34082, 68164, 85205, 136328, 170410, 340820, 528271, 681640, 1056542, 2113084, 2641355, 4226168, 5282710, 10565420, 21130840]

約数ペア:

[(1, 21130840), (2, 10565420), (4, 5282710), (5, 4226168), (8, 2641355), (10, 2113084), (20, 1056542), (31, 681640), (40, 528271), (62, 340820), (124, 170410), (155, 136328), (248, 85205), (310, 68164), (620, 34082), (1240, 17041)]