19705660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3989}}^1$

素因数の和:4030

約数の個数: 48

約数和(自身を含む): 46922400

約数和(自身を除く): 27216740

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 3989, 4940, 7978, 15956, 19945, 39890, 51857, 75791, 79780, 103714, 151582, 207428, 259285, 303164, 378955, 518570, 757910, 985283, 1037140, 1515820, 1970566, 3941132, 4926415, 9852830, 19705660]

約数ペア:

[(1, 19705660), (2, 9852830), (4, 4926415), (5, 3941132), (10, 1970566), (13, 1515820), (19, 1037140), (20, 985283), (26, 757910), (38, 518570), (52, 378955), (65, 303164), (76, 259285), (95, 207428), (130, 151582), (190, 103714), (247, 79780), (260, 75791), (380, 51857), (494, 39890), (988, 19945), (1235, 15956), (2470, 7978), (3989, 4940)]