19961655

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{211}}^1$

素因数の和:296

約数の個数: 64

約数和(自身を含む): 39564288

約数和(自身を除く): 19602633

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 53, 85, 105, 119, 159, 211, 255, 265, 357, 371, 595, 633, 795, 901, 1055, 1113, 1477, 1785, 1855, 2703, 3165, 3587, 4431, 4505, 5565, 6307, 7385, 10761, 11183, 13515, 17935, 18921, 22155, 25109, 31535, 33549, 53805, 55915, 75327, 78281, 94605, 125545, 167745, 190111, 234843, 376635, 391405, 570333, 950555, 1174215, 1330777, 2851665, 3992331, 6653885, 19961655]

約数ペア:

[(1, 19961655), (3, 6653885), (5, 3992331), (7, 2851665), (15, 1330777), (17, 1174215), (21, 950555), (35, 570333), (51, 391405), (53, 376635), (85, 234843), (105, 190111), (119, 167745), (159, 125545), (211, 94605), (255, 78281), (265, 75327), (357, 55915), (371, 53805), (595, 33549), (633, 31535), (795, 25109), (901, 22155), (1055, 18921), (1113, 17935), (1477, 13515), (1785, 11183), (1855, 10761), (2703, 7385), (3165, 6307), (3587, 5565), (4431, 4505)]