21205575

素因数分解:

$3^2\times 5^2\times {\mathrm{79}}^1\times {\mathrm{1193}}^1$

素因数の和:1288

約数の個数: 36

約数和(自身を含む): 38494560

約数和(自身を除く): 17288985

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 79, 225, 237, 395, 711, 1185, 1193, 1975, 3555, 3579, 5925, 5965, 10737, 17775, 17895, 29825, 53685, 89475, 94247, 268425, 282741, 471235, 848223, 1413705, 2356175, 4241115, 7068525, 21205575]

約数ペア:

[(1, 21205575), (3, 7068525), (5, 4241115), (9, 2356175), (15, 1413705), (25, 848223), (45, 471235), (75, 282741), (79, 268425), (225, 94247), (237, 89475), (395, 53685), (711, 29825), (1185, 17895), (1193, 17775), (1975, 10737), (3555, 5965), (3579, 5925)]