19729450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{239}}^1$

素因数の和:391

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 20267990

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 127, 130, 239, 254, 325, 478, 635, 650, 1195, 1270, 1651, 2390, 3107, 3175, 3302, 5975, 6214, 6350, 8255, 11950, 15535, 16510, 30353, 31070, 41275, 60706, 77675, 82550, 151765, 155350, 303530, 394589, 758825, 789178, 1517650, 1972945, 3945890, 9864725, 19729450]

約数ペア:

[(1, 19729450), (2, 9864725), (5, 3945890), (10, 1972945), (13, 1517650), (25, 789178), (26, 758825), (50, 394589), (65, 303530), (127, 155350), (130, 151765), (239, 82550), (254, 77675), (325, 60706), (478, 41275), (635, 31070), (650, 30353), (1195, 16510), (1270, 15535), (1651, 11950), (2390, 8255), (3107, 6350), (3175, 6214), (3302, 5975)]