20703825

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{167}}^1$

素因数の和:231

約数の個数: 72

約数和(自身を含む): 40622400

約数和(自身を除く): 19918575

約数列:

[1, 3, 5, 9, 15, 19, 25, 29, 45, 57, 75, 87, 95, 145, 167, 171, 225, 261, 285, 435, 475, 501, 551, 725, 835, 855, 1305, 1425, 1503, 1653, 2175, 2505, 2755, 3173, 4175, 4275, 4843, 4959, 6525, 7515, 8265, 9519, 12525, 13775, 14529, 15865, 24215, 24795, 28557, 37575, 41325, 43587, 47595, 72645, 79325, 92017, 121075, 123975, 142785, 217935, 237975, 276051, 363225, 460085, 713925, 828153, 1089675, 1380255, 2300425, 4140765, 6901275, 20703825]

約数ペア:

[(1, 20703825), (3, 6901275), (5, 4140765), (9, 2300425), (15, 1380255), (19, 1089675), (25, 828153), (29, 713925), (45, 460085), (57, 363225), (75, 276051), (87, 237975), (95, 217935), (145, 142785), (167, 123975), (171, 121075), (225, 92017), (261, 79325), (285, 72645), (435, 47595), (475, 43587), (501, 41325), (551, 37575), (725, 28557), (835, 24795), (855, 24215), (1305, 15865), (1425, 14529), (1503, 13775), (1653, 12525), (2175, 9519), (2505, 8265), (2755, 7515), (3173, 6525), (4175, 4959), (4275, 4843)]