18955980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1987}}^1$

素因数の和:2055

約数の個数: 72

約数和(自身を含む): 58614192

約数和(自身を除く): 39658212

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 53, 60, 90, 106, 159, 180, 212, 265, 318, 477, 530, 636, 795, 954, 1060, 1590, 1908, 1987, 2385, 3180, 3974, 4770, 5961, 7948, 9540, 9935, 11922, 17883, 19870, 23844, 29805, 35766, 39740, 59610, 71532, 89415, 105311, 119220, 178830, 210622, 315933, 357660, 421244, 526555, 631866, 947799, 1053110, 1263732, 1579665, 1895598, 2106220, 3159330, 3791196, 4738995, 6318660, 9477990, 18955980]

約数ペア:

[(1, 18955980), (2, 9477990), (3, 6318660), (4, 4738995), (5, 3791196), (6, 3159330), (9, 2106220), (10, 1895598), (12, 1579665), (15, 1263732), (18, 1053110), (20, 947799), (30, 631866), (36, 526555), (45, 421244), (53, 357660), (60, 315933), (90, 210622), (106, 178830), (159, 119220), (180, 105311), (212, 89415), (265, 71532), (318, 59610), (477, 39740), (530, 35766), (636, 29805), (795, 23844), (954, 19870), (1060, 17883), (1590, 11922), (1908, 9935), (1987, 9540), (2385, 7948), (3180, 5961), (3974, 4770)]