20196020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{449}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 46040400

約数和(自身を除く): 25844380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 173, 260, 346, 449, 692, 865, 898, 1730, 1796, 2245, 2249, 3460, 4490, 4498, 5837, 8980, 8996, 11245, 11674, 22490, 23348, 29185, 44980, 58370, 77677, 116740, 155354, 310708, 388385, 776770, 1009801, 1553540, 2019602, 4039204, 5049005, 10098010, 20196020]

約数ペア:

[(1, 20196020), (2, 10098010), (4, 5049005), (5, 4039204), (10, 2019602), (13, 1553540), (20, 1009801), (26, 776770), (52, 388385), (65, 310708), (130, 155354), (173, 116740), (260, 77677), (346, 58370), (449, 44980), (692, 29185), (865, 23348), (898, 22490), (1730, 11674), (1796, 11245), (2245, 8996), (2249, 8980), (3460, 5837), (4490, 4498)]