19495580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{449}}^1$

素因数の和:638

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 24957220

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 167, 260, 334, 449, 668, 835, 898, 1670, 1796, 2171, 2245, 3340, 4342, 4490, 5837, 8684, 8980, 10855, 11674, 21710, 23348, 29185, 43420, 58370, 74983, 116740, 149966, 299932, 374915, 749830, 974779, 1499660, 1949558, 3899116, 4873895, 9747790, 19495580]

約数ペア:

[(1, 19495580), (2, 9747790), (4, 4873895), (5, 3899116), (10, 1949558), (13, 1499660), (20, 974779), (26, 749830), (52, 374915), (65, 299932), (130, 149966), (167, 116740), (260, 74983), (334, 58370), (449, 43420), (668, 29185), (835, 23348), (898, 21710), (1670, 11674), (1796, 10855), (2171, 8980), (2245, 8684), (3340, 5837), (4342, 4490)]