21373725

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{317}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 37854720

約数和(自身を除く): 16480995

約数列:

[1, 3, 5, 15, 25, 29, 31, 75, 87, 93, 145, 155, 317, 435, 465, 725, 775, 899, 951, 1585, 2175, 2325, 2697, 4495, 4755, 7925, 9193, 9827, 13485, 22475, 23775, 27579, 29481, 45965, 49135, 67425, 137895, 147405, 229825, 245675, 284983, 689475, 737025, 854949, 1424915, 4274745, 7124575, 21373725]

約数ペア:

[(1, 21373725), (3, 7124575), (5, 4274745), (15, 1424915), (25, 854949), (29, 737025), (31, 689475), (75, 284983), (87, 245675), (93, 229825), (145, 147405), (155, 137895), (317, 67425), (435, 49135), (465, 45965), (725, 29481), (775, 27579), (899, 23775), (951, 22475), (1585, 13485), (2175, 9827), (2325, 9193), (2697, 7925), (4495, 4755)]