21089445

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^2\times {\mathrm{79}}^1$

素因数の和:174

約数の個数: 48

約数和(自身を含む): 37820160

約数和(自身を除く): 16730715

約数列:

[1, 3, 5, 13, 15, 37, 39, 65, 79, 111, 185, 195, 237, 395, 481, 555, 1027, 1185, 1369, 1443, 2405, 2923, 3081, 4107, 5135, 6845, 7215, 8769, 14615, 15405, 17797, 20535, 37999, 43845, 53391, 88985, 108151, 113997, 189995, 266955, 324453, 540755, 569985, 1405963, 1622265, 4217889, 7029815, 21089445]

約数ペア:

[(1, 21089445), (3, 7029815), (5, 4217889), (13, 1622265), (15, 1405963), (37, 569985), (39, 540755), (65, 324453), (79, 266955), (111, 189995), (185, 113997), (195, 108151), (237, 88985), (395, 53391), (481, 43845), (555, 37999), (1027, 20535), (1185, 17797), (1369, 15405), (1443, 14615), (2405, 8769), (2923, 7215), (3081, 6845), (4107, 5135)]