215046980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{211}}^1\times {\mathrm{389}}^1$

素因数の和:740

約数の個数: 48

約数和(自身を含む): 458377920

約数和(自身を除く): 243330940

約数列:

[1, 2, 4, 5, 10, 20, 131, 211, 262, 389, 422, 524, 655, 778, 844, 1055, 1310, 1556, 1945, 2110, 2620, 3890, 4220, 7780, 27641, 50959, 55282, 82079, 101918, 110564, 138205, 164158, 203836, 254795, 276410, 328316, 410395, 509590, 552820, 820790, 1019180, 1641580, 10752349, 21504698, 43009396, 53761745, 107523490, 215046980]

約数ペア:

[(1, 215046980), (2, 107523490), (4, 53761745), (5, 43009396), (10, 21504698), (20, 10752349), (131, 1641580), (211, 1019180), (262, 820790), (389, 552820), (422, 509590), (524, 410395), (655, 328316), (778, 276410), (844, 254795), (1055, 203836), (1310, 164158), (1556, 138205), (1945, 110564), (2110, 101918), (2620, 82079), (3890, 55282), (4220, 50959), (7780, 27641)]