19720278

素因数分解:

$2^1\times 3^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{599}}^1$

素因数の和:697

約数の個数: 48

約数和(自身を含む): 44928000

約数和(自身を除く): 25207722

約数列:

[1, 2, 3, 6, 9, 18, 31, 59, 62, 93, 118, 177, 186, 279, 354, 531, 558, 599, 1062, 1198, 1797, 1829, 3594, 3658, 5391, 5487, 10782, 10974, 16461, 18569, 32922, 35341, 37138, 55707, 70682, 106023, 111414, 167121, 212046, 318069, 334242, 636138, 1095571, 2191142, 3286713, 6573426, 9860139, 19720278]

約数ペア:

[(1, 19720278), (2, 9860139), (3, 6573426), (6, 3286713), (9, 2191142), (18, 1095571), (31, 636138), (59, 334242), (62, 318069), (93, 212046), (118, 167121), (177, 111414), (186, 106023), (279, 70682), (354, 55707), (531, 37138), (558, 35341), (599, 32922), (1062, 18569), (1198, 16461), (1797, 10974), (1829, 10782), (3594, 5487), (3658, 5391)]