21071280

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{87797}}^1$

素因数の和:87813

約数の個数: 40

約数和(自身を含む): 65321712

約数和(自身を除く): 44250432

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 87797, 175594, 263391, 351188, 438985, 526782, 702376, 877970, 1053564, 1316955, 1404752, 1755940, 2107128, 2633910, 3511880, 4214256, 5267820, 7023760, 10535640, 21071280]

約数ペア:

[(1, 21071280), (2, 10535640), (3, 7023760), (4, 5267820), (5, 4214256), (6, 3511880), (8, 2633910), (10, 2107128), (12, 1755940), (15, 1404752), (16, 1316955), (20, 1053564), (24, 877970), (30, 702376), (40, 526782), (48, 438985), (60, 351188), (80, 263391), (120, 175594), (240, 87797)]