21104025

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{313}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 37378560

約数和(自身を除く): 16274535

約数列:

[1, 3, 5, 15, 25, 29, 31, 75, 87, 93, 145, 155, 313, 435, 465, 725, 775, 899, 939, 1565, 2175, 2325, 2697, 4495, 4695, 7825, 9077, 9703, 13485, 22475, 23475, 27231, 29109, 45385, 48515, 67425, 136155, 145545, 226925, 242575, 281387, 680775, 727725, 844161, 1406935, 4220805, 7034675, 21104025]

約数ペア:

[(1, 21104025), (3, 7034675), (5, 4220805), (15, 1406935), (25, 844161), (29, 727725), (31, 680775), (75, 281387), (87, 242575), (93, 226925), (145, 145545), (155, 136155), (313, 67425), (435, 48515), (465, 45385), (725, 29109), (775, 27231), (899, 23475), (939, 22475), (1565, 13485), (2175, 9703), (2325, 9077), (2697, 7825), (4495, 4695)]