138018820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{43}}^1\times {\mathrm{167}}^1$

素因数の和:281

約数の個数: 72

約数和(自身を含む): 308290752

約数和(自身を除く): 170271932

約数列:

[1, 2, 4, 5, 10, 20, 31, 43, 62, 86, 124, 155, 167, 172, 215, 310, 334, 430, 620, 668, 835, 860, 961, 1333, 1670, 1922, 2666, 3340, 3844, 4805, 5177, 5332, 6665, 7181, 9610, 10354, 13330, 14362, 19220, 20708, 25885, 26660, 28724, 35905, 41323, 51770, 71810, 82646, 103540, 143620, 160487, 165292, 206615, 222611, 320974, 413230, 445222, 641948, 802435, 826460, 890444, 1113055, 1604870, 2226110, 3209740, 4452220, 6900941, 13801882, 27603764, 34504705, 69009410, 138018820]

約数ペア:

[(1, 138018820), (2, 69009410), (4, 34504705), (5, 27603764), (10, 13801882), (20, 6900941), (31, 4452220), (43, 3209740), (62, 2226110), (86, 1604870), (124, 1113055), (155, 890444), (167, 826460), (172, 802435), (215, 641948), (310, 445222), (334, 413230), (430, 320974), (620, 222611), (668, 206615), (835, 165292), (860, 160487), (961, 143620), (1333, 103540), (1670, 82646), (1922, 71810), (2666, 51770), (3340, 41323), (3844, 35905), (4805, 28724), (5177, 26660), (5332, 25885), (6665, 20708), (7181, 19220), (9610, 14362), (10354, 13330)]