9978920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{227}}^1$

素因数の和:402

約数の個数: 64

約数和(自身を含む): 25937280

約数和(自身を除く): 15958360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 227, 280, 314, 454, 628, 785, 908, 1099, 1135, 1256, 1570, 1589, 1816, 2198, 2270, 3140, 3178, 4396, 4540, 5495, 6280, 6356, 7945, 8792, 9080, 10990, 12712, 15890, 21980, 31780, 35639, 43960, 63560, 71278, 142556, 178195, 249473, 285112, 356390, 498946, 712780, 997892, 1247365, 1425560, 1995784, 2494730, 4989460, 9978920]

約数ペア:

[(1, 9978920), (2, 4989460), (4, 2494730), (5, 1995784), (7, 1425560), (8, 1247365), (10, 997892), (14, 712780), (20, 498946), (28, 356390), (35, 285112), (40, 249473), (56, 178195), (70, 142556), (140, 71278), (157, 63560), (227, 43960), (280, 35639), (314, 31780), (454, 21980), (628, 15890), (785, 12712), (908, 10990), (1099, 9080), (1135, 8792), (1256, 7945), (1570, 6356), (1589, 6280), (1816, 5495), (2198, 4540), (2270, 4396), (3140, 3178)]