18923720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1637}}^1$

素因数の和:1682

約数の個数: 48

約数和(自身を含む): 45257940

約数和(自身を除く): 26334220

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 289, 340, 578, 680, 1156, 1445, 1637, 2312, 2890, 3274, 5780, 6548, 8185, 11560, 13096, 16370, 27829, 32740, 55658, 65480, 111316, 139145, 222632, 278290, 473093, 556580, 946186, 1113160, 1892372, 2365465, 3784744, 4730930, 9461860, 18923720]

約数ペア:

[(1, 18923720), (2, 9461860), (4, 4730930), (5, 3784744), (8, 2365465), (10, 1892372), (17, 1113160), (20, 946186), (34, 556580), (40, 473093), (68, 278290), (85, 222632), (136, 139145), (170, 111316), (289, 65480), (340, 55658), (578, 32740), (680, 27829), (1156, 16370), (1445, 13096), (1637, 11560), (2312, 8185), (2890, 6548), (3274, 5780)]