21517275

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{761}}^1$

素因数の和:816

約数の個数: 48

約数和(自身を含む): 39684960

約数和(自身を除く): 18167685

約数列:

[1, 3, 5, 13, 15, 25, 29, 39, 65, 75, 87, 145, 195, 325, 377, 435, 725, 761, 975, 1131, 1885, 2175, 2283, 3805, 5655, 9425, 9893, 11415, 19025, 22069, 28275, 29679, 49465, 57075, 66207, 110345, 148395, 247325, 286897, 331035, 551725, 741975, 860691, 1434485, 1655175, 4303455, 7172425, 21517275]

約数ペア:

[(1, 21517275), (3, 7172425), (5, 4303455), (13, 1655175), (15, 1434485), (25, 860691), (29, 741975), (39, 551725), (65, 331035), (75, 286897), (87, 247325), (145, 148395), (195, 110345), (325, 66207), (377, 57075), (435, 49465), (725, 29679), (761, 28275), (975, 22069), (1131, 19025), (1885, 11415), (2175, 9893), (2283, 9425), (3805, 5655)]