20354780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{457}}^1$

素因数の和:614

約数の個数: 48

約数和(自身を含む): 45704736

約数和(自身を除く): 25349956

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 131, 170, 262, 340, 457, 524, 655, 914, 1310, 1828, 2227, 2285, 2620, 4454, 4570, 7769, 8908, 9140, 11135, 15538, 22270, 31076, 38845, 44540, 59867, 77690, 119734, 155380, 239468, 299335, 598670, 1017739, 1197340, 2035478, 4070956, 5088695, 10177390, 20354780]

約数ペア:

[(1, 20354780), (2, 10177390), (4, 5088695), (5, 4070956), (10, 2035478), (17, 1197340), (20, 1017739), (34, 598670), (68, 299335), (85, 239468), (131, 155380), (170, 119734), (262, 77690), (340, 59867), (457, 44540), (524, 38845), (655, 31076), (914, 22270), (1310, 15538), (1828, 11135), (2227, 9140), (2285, 8908), (2620, 7769), (4454, 4570)]