12781278

素因数分解:

$2^1\times 3^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:289

約数の個数: 48

約数和(自身を含む): 28675296

約数和(自身を除く): 15894018

約数列:

[1, 2, 3, 6, 9, 18, 71, 73, 137, 142, 146, 213, 219, 274, 411, 426, 438, 639, 657, 822, 1233, 1278, 1314, 2466, 5183, 9727, 10001, 10366, 15549, 19454, 20002, 29181, 30003, 31098, 46647, 58362, 60006, 87543, 90009, 93294, 175086, 180018, 710071, 1420142, 2130213, 4260426, 6390639, 12781278]

約数ペア:

[(1, 12781278), (2, 6390639), (3, 4260426), (6, 2130213), (9, 1420142), (18, 710071), (71, 180018), (73, 175086), (137, 93294), (142, 90009), (146, 87543), (213, 60006), (219, 58362), (274, 46647), (411, 31098), (426, 30003), (438, 29181), (639, 20002), (657, 19454), (822, 15549), (1233, 10366), (1278, 10001), (1314, 9727), (2466, 5183)]