51146980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{199}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 110073600

約数和(自身を除く): 58926620

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 181, 199, 284, 355, 362, 398, 710, 724, 796, 905, 995, 1420, 1810, 1990, 3620, 3980, 12851, 14129, 25702, 28258, 36019, 51404, 56516, 64255, 70645, 72038, 128510, 141290, 144076, 180095, 257020, 282580, 360190, 720380, 2557349, 5114698, 10229396, 12786745, 25573490, 51146980]

約数ペア:

[(1, 51146980), (2, 25573490), (4, 12786745), (5, 10229396), (10, 5114698), (20, 2557349), (71, 720380), (142, 360190), (181, 282580), (199, 257020), (284, 180095), (355, 144076), (362, 141290), (398, 128510), (710, 72038), (724, 70645), (796, 64255), (905, 56516), (995, 51404), (1420, 36019), (1810, 28258), (1990, 25702), (3620, 14129), (3980, 12851)]