21291451775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{131449}}^1$

素因数の和:131520

約数の個数: 48

約数和(自身を含む): 31295616000

約数和(自身を除く): 10004164225

約数列:

[1, 5, 11, 19, 25, 31, 55, 95, 155, 209, 275, 341, 475, 589, 775, 1045, 1705, 2945, 5225, 6479, 8525, 14725, 32395, 131449, 161975, 657245, 1445939, 2497531, 3286225, 4074919, 7229695, 12487655, 20374595, 27472841, 36148475, 44824109, 62438275, 77423461, 101872975, 137364205, 224120545, 387117305, 686821025, 851658071, 1120602725, 1935586525, 4258290355, 21291451775]

約数ペア:

[(1, 21291451775), (5, 4258290355), (11, 1935586525), (19, 1120602725), (25, 851658071), (31, 686821025), (55, 387117305), (95, 224120545), (155, 137364205), (209, 101872975), (275, 77423461), (341, 62438275), (475, 44824109), (589, 36148475), (775, 27472841), (1045, 20374595), (1705, 12487655), (2945, 7229695), (5225, 4074919), (6479, 3286225), (8525, 2497531), (14725, 1445939), (32395, 657245), (131449, 161975)]