19449820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{313}}^1$

素因数の和:574

約数の個数: 48

約数和(自身を含む): 44311680

約数和(自身を除く): 24861860

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 239, 260, 313, 478, 626, 956, 1195, 1252, 1565, 2390, 3107, 3130, 4069, 4780, 6214, 6260, 8138, 12428, 15535, 16276, 20345, 31070, 40690, 62140, 74807, 81380, 149614, 299228, 374035, 748070, 972491, 1496140, 1944982, 3889964, 4862455, 9724910, 19449820]

約数ペア:

[(1, 19449820), (2, 9724910), (4, 4862455), (5, 3889964), (10, 1944982), (13, 1496140), (20, 972491), (26, 748070), (52, 374035), (65, 299228), (130, 149614), (239, 81380), (260, 74807), (313, 62140), (478, 40690), (626, 31070), (956, 20345), (1195, 16276), (1252, 15535), (1565, 12428), (2390, 8138), (3107, 6260), (3130, 6214), (4069, 4780)]