21722720

素因数分解:

$2^5\times 5^1\times {\mathrm{137}}^1\times {\mathrm{991}}^1$

素因数の和:1143

約数の個数: 48

約数和(自身を含む): 51746688

約数和(自身を除く): 30023968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 137, 160, 274, 548, 685, 991, 1096, 1370, 1982, 2192, 2740, 3964, 4384, 4955, 5480, 7928, 9910, 10960, 15856, 19820, 21920, 31712, 39640, 79280, 135767, 158560, 271534, 543068, 678835, 1086136, 1357670, 2172272, 2715340, 4344544, 5430680, 10861360, 21722720]

約数ペア:

[(1, 21722720), (2, 10861360), (4, 5430680), (5, 4344544), (8, 2715340), (10, 2172272), (16, 1357670), (20, 1086136), (32, 678835), (40, 543068), (80, 271534), (137, 158560), (160, 135767), (274, 79280), (548, 39640), (685, 31712), (991, 21920), (1096, 19820), (1370, 15856), (1982, 10960), (2192, 9910), (2740, 7928), (3964, 5480), (4384, 4955)]