19879340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{487}}^1$

素因数の和:666

約数の個数: 48

約数和(自身を含む): 45337152

約数和(自身を除く): 25457812

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 487, 628, 785, 974, 1570, 1948, 2041, 2435, 3140, 4082, 4870, 6331, 8164, 9740, 10205, 12662, 20410, 25324, 31655, 40820, 63310, 76459, 126620, 152918, 305836, 382295, 764590, 993967, 1529180, 1987934, 3975868, 4969835, 9939670, 19879340]

約数ペア:

[(1, 19879340), (2, 9939670), (4, 4969835), (5, 3975868), (10, 1987934), (13, 1529180), (20, 993967), (26, 764590), (52, 382295), (65, 305836), (130, 152918), (157, 126620), (260, 76459), (314, 63310), (487, 40820), (628, 31655), (785, 25324), (974, 20410), (1570, 12662), (1948, 10205), (2041, 9740), (2435, 8164), (3140, 6331), (4082, 4870)]