21972285

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{149}}^1$

素因数の和:302

約数の個数: 48

約数和(自身を含む): 40014000

約数和(自身を除く): 18041715

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 113, 145, 149, 261, 339, 435, 447, 565, 745, 1017, 1305, 1341, 1695, 2235, 3277, 4321, 5085, 6705, 9831, 12963, 16385, 16837, 21605, 29493, 38889, 49155, 50511, 64815, 84185, 147465, 151533, 194445, 252555, 488273, 757665, 1464819, 2441365, 4394457, 7324095, 21972285]

約数ペア:

[(1, 21972285), (3, 7324095), (5, 4394457), (9, 2441365), (15, 1464819), (29, 757665), (45, 488273), (87, 252555), (113, 194445), (145, 151533), (149, 147465), (261, 84185), (339, 64815), (435, 50511), (447, 49155), (565, 38889), (745, 29493), (1017, 21605), (1305, 16837), (1341, 16385), (1695, 12963), (2235, 9831), (3277, 6705), (4321, 5085)]