81977720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{883}}^1$

素因数の和:1116

約数の個数: 64

約数和(自身を含む): 202400640

約数和(自身を除く): 120422920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 211, 220, 422, 440, 844, 883, 1055, 1688, 1766, 2110, 2321, 3532, 4220, 4415, 4642, 7064, 8440, 8830, 9284, 9713, 11605, 17660, 18568, 19426, 23210, 35320, 38852, 46420, 48565, 77704, 92840, 97130, 186313, 194260, 372626, 388520, 745252, 931565, 1490504, 1863130, 2049443, 3726260, 4098886, 7452520, 8197772, 10247215, 16395544, 20494430, 40988860, 81977720]

約数ペア:

[(1, 81977720), (2, 40988860), (4, 20494430), (5, 16395544), (8, 10247215), (10, 8197772), (11, 7452520), (20, 4098886), (22, 3726260), (40, 2049443), (44, 1863130), (55, 1490504), (88, 931565), (110, 745252), (211, 388520), (220, 372626), (422, 194260), (440, 186313), (844, 97130), (883, 92840), (1055, 77704), (1688, 48565), (1766, 46420), (2110, 38852), (2321, 35320), (3532, 23210), (4220, 19426), (4415, 18568), (4642, 17660), (7064, 11605), (8440, 9713), (8830, 9284)]