19894280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{227}}^1\times {\mathrm{313}}^1$

素因数の和:558

約数の個数: 64

約数和(自身を含む): 51546240

約数和(自身を除く): 31651960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 227, 280, 313, 454, 626, 908, 1135, 1252, 1565, 1589, 1816, 2191, 2270, 2504, 3130, 3178, 4382, 4540, 6260, 6356, 7945, 8764, 9080, 10955, 12520, 12712, 15890, 17528, 21910, 31780, 43820, 63560, 71051, 87640, 142102, 284204, 355255, 497357, 568408, 710510, 994714, 1421020, 1989428, 2486785, 2842040, 3978856, 4973570, 9947140, 19894280]

約数ペア:

[(1, 19894280), (2, 9947140), (4, 4973570), (5, 3978856), (7, 2842040), (8, 2486785), (10, 1989428), (14, 1421020), (20, 994714), (28, 710510), (35, 568408), (40, 497357), (56, 355255), (70, 284204), (140, 142102), (227, 87640), (280, 71051), (313, 63560), (454, 43820), (626, 31780), (908, 21910), (1135, 17528), (1252, 15890), (1565, 12712), (1589, 12520), (1816, 10955), (2191, 9080), (2270, 8764), (2504, 7945), (3130, 6356), (3178, 6260), (4382, 4540)]