18990900

素因数分解:

$2^2\times 3^2\times 5^2\times {\mathrm{21101}}^1$

素因数の和:21121

約数の個数: 54

約数和(自身を含む): 59528742

約数和(自身を除く): 40537842

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 90, 100, 150, 180, 225, 300, 450, 900, 21101, 42202, 63303, 84404, 105505, 126606, 189909, 211010, 253212, 316515, 379818, 422020, 527525, 633030, 759636, 949545, 1055050, 1266060, 1582575, 1899090, 2110100, 3165150, 3798180, 4747725, 6330300, 9495450, 18990900]

約数ペア:

[(1, 18990900), (2, 9495450), (3, 6330300), (4, 4747725), (5, 3798180), (6, 3165150), (9, 2110100), (10, 1899090), (12, 1582575), (15, 1266060), (18, 1055050), (20, 949545), (25, 759636), (30, 633030), (36, 527525), (45, 422020), (50, 379818), (60, 316515), (75, 253212), (90, 211010), (100, 189909), (150, 126606), (180, 105505), (225, 84404), (300, 63303), (450, 42202), (900, 21101)]