640088

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:155

約数の個数: 32

約数和(自身を含む): 1296000

約数和(自身を除く): 655912

約数列:

[1, 2, 4, 8, 29, 31, 58, 62, 89, 116, 124, 178, 232, 248, 356, 712, 899, 1798, 2581, 2759, 3596, 5162, 5518, 7192, 10324, 11036, 20648, 22072, 80011, 160022, 320044, 640088]

約数ペア:

[(1, 640088), (2, 320044), (4, 160022), (8, 80011), (29, 22072), (31, 20648), (58, 11036), (62, 10324), (89, 7192), (116, 5518), (124, 5162), (178, 3596), (232, 2759), (248, 2581), (356, 1798), (712, 899)]