81990700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{3923}}^1$

素因数の和:3967

約数の個数: 72

約数和(自身を含む): 204361920

約数和(自身を除く): 122371220

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 25, 38, 44, 50, 55, 76, 95, 100, 110, 190, 209, 220, 275, 380, 418, 475, 550, 836, 950, 1045, 1100, 1900, 2090, 3923, 4180, 5225, 7846, 10450, 15692, 19615, 20900, 39230, 43153, 74537, 78460, 86306, 98075, 149074, 172612, 196150, 215765, 298148, 372685, 392300, 431530, 745370, 819907, 863060, 1078825, 1490740, 1639814, 1863425, 2157650, 3279628, 3726850, 4099535, 4315300, 7453700, 8199070, 16398140, 20497675, 40995350, 81990700]

約数ペア:

[(1, 81990700), (2, 40995350), (4, 20497675), (5, 16398140), (10, 8199070), (11, 7453700), (19, 4315300), (20, 4099535), (22, 3726850), (25, 3279628), (38, 2157650), (44, 1863425), (50, 1639814), (55, 1490740), (76, 1078825), (95, 863060), (100, 819907), (110, 745370), (190, 431530), (209, 392300), (220, 372685), (275, 298148), (380, 215765), (418, 196150), (475, 172612), (550, 149074), (836, 98075), (950, 86306), (1045, 78460), (1100, 74537), (1900, 43153), (2090, 39230), (3923, 20900), (4180, 19615), (5225, 15692), (7846, 10450)]