20744540

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{113}}^1\times {\mathrm{137}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 44930592

約数和(自身を除く): 24186052

約数列:

[1, 2, 4, 5, 10, 20, 67, 113, 134, 137, 226, 268, 274, 335, 452, 548, 565, 670, 685, 1130, 1340, 1370, 2260, 2740, 7571, 9179, 15142, 15481, 18358, 30284, 30962, 36716, 37855, 45895, 61924, 75710, 77405, 91790, 151420, 154810, 183580, 309620, 1037227, 2074454, 4148908, 5186135, 10372270, 20744540]

約数ペア:

[(1, 20744540), (2, 10372270), (4, 5186135), (5, 4148908), (10, 2074454), (20, 1037227), (67, 309620), (113, 183580), (134, 154810), (137, 151420), (226, 91790), (268, 77405), (274, 75710), (335, 61924), (452, 45895), (548, 37855), (565, 36716), (670, 30962), (685, 30284), (1130, 18358), (1340, 15481), (1370, 15142), (2260, 9179), (2740, 7571)]