393040

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^3$

素因数の和:64

約数の個数: 40

約数和(自身を含む): 970920

約数和(自身を除く): 577880

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 289, 340, 578, 680, 1156, 1360, 1445, 2312, 2890, 4624, 4913, 5780, 9826, 11560, 19652, 23120, 24565, 39304, 49130, 78608, 98260, 196520, 393040]

約数ペア:

[(1, 393040), (2, 196520), (4, 98260), (5, 78608), (8, 49130), (10, 39304), (16, 24565), (17, 23120), (20, 19652), (34, 11560), (40, 9826), (68, 5780), (80, 4913), (85, 4624), (136, 2890), (170, 2312), (272, 1445), (289, 1360), (340, 1156), (578, 680)]