20475225

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:187

約数の個数: 72

約数和(自身を含む): 39955032

約数和(自身を除く): 19479807

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 53, 75, 85, 101, 153, 159, 225, 255, 265, 303, 425, 477, 505, 765, 795, 901, 909, 1275, 1325, 1515, 1717, 2385, 2525, 2703, 3825, 3975, 4505, 4545, 5151, 5353, 7575, 8109, 8585, 11925, 13515, 15453, 16059, 22525, 22725, 25755, 26765, 40545, 42925, 48177, 67575, 77265, 80295, 91001, 128775, 133825, 202725, 240885, 273003, 386325, 401475, 455005, 819009, 1204425, 1365015, 2275025, 4095045, 6825075, 20475225]

約数ペア:

[(1, 20475225), (3, 6825075), (5, 4095045), (9, 2275025), (15, 1365015), (17, 1204425), (25, 819009), (45, 455005), (51, 401475), (53, 386325), (75, 273003), (85, 240885), (101, 202725), (153, 133825), (159, 128775), (225, 91001), (255, 80295), (265, 77265), (303, 67575), (425, 48177), (477, 42925), (505, 40545), (765, 26765), (795, 25755), (901, 22725), (909, 22525), (1275, 16059), (1325, 15453), (1515, 13515), (1717, 11925), (2385, 8585), (2525, 8109), (2703, 7575), (3825, 5353), (3975, 5151), (4505, 4545)]