19881780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{229}}^1\times {\mathrm{1447}}^1$

素因数の和:1688

約数の個数: 48

約数和(自身を含む): 55950720

約数和(自身を除く): 36068940

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 229, 458, 687, 916, 1145, 1374, 1447, 2290, 2748, 2894, 3435, 4341, 4580, 5788, 6870, 7235, 8682, 13740, 14470, 17364, 21705, 28940, 43410, 86820, 331363, 662726, 994089, 1325452, 1656815, 1988178, 3313630, 3976356, 4970445, 6627260, 9940890, 19881780]

約数ペア:

[(1, 19881780), (2, 9940890), (3, 6627260), (4, 4970445), (5, 3976356), (6, 3313630), (10, 1988178), (12, 1656815), (15, 1325452), (20, 994089), (30, 662726), (60, 331363), (229, 86820), (458, 43410), (687, 28940), (916, 21705), (1145, 17364), (1374, 14470), (1447, 13740), (2290, 8682), (2748, 7235), (2894, 6870), (3435, 5788), (4341, 4580)]