21039304

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{347}}^1$

素因数の和:430

約数の個数: 64

約数和(自身を含む): 47355840

約数和(自身を除く): 26316536

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 53, 88, 104, 106, 143, 212, 286, 347, 424, 572, 583, 689, 694, 1144, 1166, 1378, 1388, 2332, 2756, 2776, 3817, 4511, 4664, 5512, 7579, 7634, 9022, 15158, 15268, 18044, 18391, 30316, 30536, 36088, 36782, 49621, 60632, 73564, 99242, 147128, 198484, 202301, 239083, 396968, 404602, 478166, 809204, 956332, 1618408, 1912664, 2629913, 5259826, 10519652, 21039304]

約数ペア:

[(1, 21039304), (2, 10519652), (4, 5259826), (8, 2629913), (11, 1912664), (13, 1618408), (22, 956332), (26, 809204), (44, 478166), (52, 404602), (53, 396968), (88, 239083), (104, 202301), (106, 198484), (143, 147128), (212, 99242), (286, 73564), (347, 60632), (424, 49621), (572, 36782), (583, 36088), (689, 30536), (694, 30316), (1144, 18391), (1166, 18044), (1378, 15268), (1388, 15158), (2332, 9022), (2756, 7634), (2776, 7579), (3817, 5512), (4511, 4664)]