20711860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2153}}^1$

素因数の和:2212

約数の個数: 48

約数和(自身を含む): 48128976

約数和(自身を除く): 27417116

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 185, 260, 370, 481, 740, 962, 1924, 2153, 2405, 4306, 4810, 8612, 9620, 10765, 21530, 27989, 43060, 55978, 79661, 111956, 139945, 159322, 279890, 318644, 398305, 559780, 796610, 1035593, 1593220, 2071186, 4142372, 5177965, 10355930, 20711860]

約数ペア:

[(1, 20711860), (2, 10355930), (4, 5177965), (5, 4142372), (10, 2071186), (13, 1593220), (20, 1035593), (26, 796610), (37, 559780), (52, 398305), (65, 318644), (74, 279890), (130, 159322), (148, 139945), (185, 111956), (260, 79661), (370, 55978), (481, 43060), (740, 27989), (962, 21530), (1924, 10765), (2153, 9620), (2405, 8612), (4306, 4810)]