20515860

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{293}}^1\times {\mathrm{389}}^1$

素因数の和:697

約数の個数: 72

約数和(自身を含む): 62604360

約数和(自身を除く): 42088500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 293, 389, 586, 778, 879, 1167, 1172, 1465, 1556, 1758, 1945, 2334, 2637, 2930, 3501, 3516, 3890, 4395, 4668, 5274, 5835, 5860, 7002, 7780, 8790, 10548, 11670, 13185, 14004, 17505, 17580, 23340, 26370, 35010, 52740, 70020, 113977, 227954, 341931, 455908, 569885, 683862, 1025793, 1139770, 1367724, 1709655, 2051586, 2279540, 3419310, 4103172, 5128965, 6838620, 10257930, 20515860]

約数ペア:

[(1, 20515860), (2, 10257930), (3, 6838620), (4, 5128965), (5, 4103172), (6, 3419310), (9, 2279540), (10, 2051586), (12, 1709655), (15, 1367724), (18, 1139770), (20, 1025793), (30, 683862), (36, 569885), (45, 455908), (60, 341931), (90, 227954), (180, 113977), (293, 70020), (389, 52740), (586, 35010), (778, 26370), (879, 23340), (1167, 17580), (1172, 17505), (1465, 14004), (1556, 13185), (1758, 11670), (1945, 10548), (2334, 8790), (2637, 7780), (2930, 7002), (3501, 5860), (3516, 5835), (3890, 5274), (4395, 4668)]