256851640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^3\times {\mathrm{1307}}^1$

素因数の和:1369

約数の個数: 64

約数和(自身を含む): 614498400

約数和(自身を除く): 357646760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 289, 340, 578, 680, 1156, 1307, 1445, 2312, 2614, 2890, 4913, 5228, 5780, 6535, 9826, 10456, 11560, 13070, 19652, 22219, 24565, 26140, 39304, 44438, 49130, 52280, 88876, 98260, 111095, 177752, 196520, 222190, 377723, 444380, 755446, 888760, 1510892, 1888615, 3021784, 3777230, 6421291, 7554460, 12842582, 15108920, 25685164, 32106455, 51370328, 64212910, 128425820, 256851640]

約数ペア:

[(1, 256851640), (2, 128425820), (4, 64212910), (5, 51370328), (8, 32106455), (10, 25685164), (17, 15108920), (20, 12842582), (34, 7554460), (40, 6421291), (68, 3777230), (85, 3021784), (136, 1888615), (170, 1510892), (289, 888760), (340, 755446), (578, 444380), (680, 377723), (1156, 222190), (1307, 196520), (1445, 177752), (2312, 111095), (2614, 98260), (2890, 88876), (4913, 52280), (5228, 49130), (5780, 44438), (6535, 39304), (9826, 26140), (10456, 24565), (11560, 22219), (13070, 19652)]