21130270525

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{70901}}^1$

素因数の和:71062

約数の個数: 48

約数和(自身を含む): 32494670208

約数和(自身を除く): 11364399683

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 131, 175, 325, 455, 655, 917, 1703, 2275, 3275, 4585, 8515, 11921, 22925, 42575, 59605, 70901, 298025, 354505, 496307, 921713, 1772525, 2481535, 4608565, 6451991, 9288031, 12407675, 23042825, 32259955, 46440155, 65016217, 120744403, 161299775, 232200775, 325081085, 603722015, 845210821, 1625405425, 3018610075, 4226054105, 21130270525]

約数ペア:

[(1, 21130270525), (5, 4226054105), (7, 3018610075), (13, 1625405425), (25, 845210821), (35, 603722015), (65, 325081085), (91, 232200775), (131, 161299775), (175, 120744403), (325, 65016217), (455, 46440155), (655, 32259955), (917, 23042825), (1703, 12407675), (2275, 9288031), (3275, 6451991), (4585, 4608565), (8515, 2481535), (11921, 1772525), (22925, 921713), (42575, 496307), (59605, 354505), (70901, 298025)]