18987660

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{2851}}^1$

素因数の和:2903

約数の個数: 72

約数和(自身を含む): 59173296

約数和(自身を除く): 40185636

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 74, 90, 111, 148, 180, 185, 222, 333, 370, 444, 555, 666, 740, 1110, 1332, 1665, 2220, 2851, 3330, 5702, 6660, 8553, 11404, 14255, 17106, 25659, 28510, 34212, 42765, 51318, 57020, 85530, 102636, 105487, 128295, 171060, 210974, 256590, 316461, 421948, 513180, 527435, 632922, 949383, 1054870, 1265844, 1582305, 1898766, 2109740, 3164610, 3797532, 4746915, 6329220, 9493830, 18987660]

約数ペア:

[(1, 18987660), (2, 9493830), (3, 6329220), (4, 4746915), (5, 3797532), (6, 3164610), (9, 2109740), (10, 1898766), (12, 1582305), (15, 1265844), (18, 1054870), (20, 949383), (30, 632922), (36, 527435), (37, 513180), (45, 421948), (60, 316461), (74, 256590), (90, 210974), (111, 171060), (148, 128295), (180, 105487), (185, 102636), (222, 85530), (333, 57020), (370, 51318), (444, 42765), (555, 34212), (666, 28510), (740, 25659), (1110, 17106), (1332, 14255), (1665, 11404), (2220, 8553), (2851, 6660), (3330, 5702)]