15681880

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{6427}}^1$

素因数の和:6499

約数の個数: 32

約数和(自身を含む): 35868240

約数和(自身を除く): 20186360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 6427, 12854, 25708, 32135, 51416, 64270, 128540, 257080, 392047, 784094, 1568188, 1960235, 3136376, 3920470, 7840940, 15681880]

約数ペア:

[(1, 15681880), (2, 7840940), (4, 3920470), (5, 3136376), (8, 1960235), (10, 1568188), (20, 784094), (40, 392047), (61, 257080), (122, 128540), (244, 64270), (305, 51416), (488, 32135), (610, 25708), (1220, 12854), (2440, 6427)]