19903780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2069}}^1$

素因数の和:2128

約数の個数: 48

約数和(自身を含む): 46252080

約数和(自身を除く): 26348300

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 185, 260, 370, 481, 740, 962, 1924, 2069, 2405, 4138, 4810, 8276, 9620, 10345, 20690, 26897, 41380, 53794, 76553, 107588, 134485, 153106, 268970, 306212, 382765, 537940, 765530, 995189, 1531060, 1990378, 3980756, 4975945, 9951890, 19903780]

約数ペア:

[(1, 19903780), (2, 9951890), (4, 4975945), (5, 3980756), (10, 1990378), (13, 1531060), (20, 995189), (26, 765530), (37, 537940), (52, 382765), (65, 306212), (74, 268970), (130, 153106), (148, 134485), (185, 107588), (260, 76553), (370, 53794), (481, 41380), (740, 26897), (962, 20690), (1924, 10345), (2069, 9620), (2405, 8276), (4138, 4810)]