20780110

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{179}}^1$

素因数の和:265

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 22765490

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 47, 65, 94, 95, 130, 179, 190, 235, 247, 358, 470, 494, 611, 893, 895, 1222, 1235, 1786, 1790, 2327, 2470, 3055, 3401, 4465, 4654, 6110, 6802, 8413, 8930, 11609, 11635, 16826, 17005, 23218, 23270, 34010, 42065, 44213, 58045, 84130, 88426, 109369, 116090, 159847, 218738, 221065, 319694, 442130, 546845, 799235, 1093690, 1598470, 2078011, 4156022, 10390055, 20780110]

約数ペア:

[(1, 20780110), (2, 10390055), (5, 4156022), (10, 2078011), (13, 1598470), (19, 1093690), (26, 799235), (38, 546845), (47, 442130), (65, 319694), (94, 221065), (95, 218738), (130, 159847), (179, 116090), (190, 109369), (235, 88426), (247, 84130), (358, 58045), (470, 44213), (494, 42065), (611, 34010), (893, 23270), (895, 23218), (1222, 17005), (1235, 16826), (1786, 11635), (1790, 11609), (2327, 8930), (2470, 8413), (3055, 6802), (3401, 6110), (4465, 4654)]