18800470

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{181}}^1$

素因数の和:265

約数の個数: 64

約数和(自身を含む): 39626496

約数和(自身を除く): 20826026

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 47, 65, 85, 94, 130, 170, 181, 221, 235, 362, 442, 470, 611, 799, 905, 1105, 1222, 1598, 1810, 2210, 2353, 3055, 3077, 3995, 4706, 6110, 6154, 7990, 8507, 10387, 11765, 15385, 17014, 20774, 23530, 30770, 40001, 42535, 51935, 80002, 85070, 103870, 110591, 144619, 200005, 221182, 289238, 400010, 552955, 723095, 1105910, 1446190, 1880047, 3760094, 9400235, 18800470]

約数ペア:

[(1, 18800470), (2, 9400235), (5, 3760094), (10, 1880047), (13, 1446190), (17, 1105910), (26, 723095), (34, 552955), (47, 400010), (65, 289238), (85, 221182), (94, 200005), (130, 144619), (170, 110591), (181, 103870), (221, 85070), (235, 80002), (362, 51935), (442, 42535), (470, 40001), (611, 30770), (799, 23530), (905, 20774), (1105, 17014), (1222, 15385), (1598, 11765), (1810, 10387), (2210, 8507), (2353, 7990), (3055, 6154), (3077, 6110), (3995, 4706)]