19915953

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{269}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 29548800

約数和(自身を除く): 9632847

約数列:

[1, 3, 23, 29, 37, 69, 87, 111, 269, 667, 807, 851, 1073, 2001, 2553, 3219, 6187, 7801, 9953, 18561, 23403, 24679, 29859, 74037, 179423, 228919, 288637, 538269, 686757, 865911, 6638651, 19915953]

約数ペア:

[(1, 19915953), (3, 6638651), (23, 865911), (29, 686757), (37, 538269), (69, 288637), (87, 228919), (111, 179423), (269, 74037), (667, 29859), (807, 24679), (851, 23403), (1073, 18561), (2001, 9953), (2553, 7801), (3219, 6187)]