20953140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{26863}}^1$

素因数の和:26888

約数の個数: 48

約数和(自身を含む): 63184128

約数和(自身を除く): 42230988

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 26863, 53726, 80589, 107452, 134315, 161178, 268630, 322356, 349219, 402945, 537260, 698438, 805890, 1047657, 1396876, 1611780, 1746095, 2095314, 3492190, 4190628, 5238285, 6984380, 10476570, 20953140]

約数ペア:

[(1, 20953140), (2, 10476570), (3, 6984380), (4, 5238285), (5, 4190628), (6, 3492190), (10, 2095314), (12, 1746095), (13, 1611780), (15, 1396876), (20, 1047657), (26, 805890), (30, 698438), (39, 537260), (52, 402945), (60, 349219), (65, 322356), (78, 268630), (130, 161178), (156, 134315), (195, 107452), (260, 80589), (390, 53726), (780, 26863)]