21296925

素因数分解:

$3^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{809}}^1$

素因数の和:844

約数の個数: 60

約数和(自身を含む): 42536340

約数和(自身を除く): 21239415

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 81, 117, 135, 195, 225, 325, 351, 405, 585, 675, 809, 975, 1053, 1755, 2025, 2427, 2925, 4045, 5265, 7281, 8775, 10517, 12135, 20225, 21843, 26325, 31551, 36405, 52585, 60675, 65529, 94653, 109215, 157755, 182025, 262925, 283959, 327645, 473265, 546075, 788775, 851877, 1419795, 1638225, 2366325, 4259385, 7098975, 21296925]

約数ペア:

[(1, 21296925), (3, 7098975), (5, 4259385), (9, 2366325), (13, 1638225), (15, 1419795), (25, 851877), (27, 788775), (39, 546075), (45, 473265), (65, 327645), (75, 283959), (81, 262925), (117, 182025), (135, 157755), (195, 109215), (225, 94653), (325, 65529), (351, 60675), (405, 52585), (585, 36405), (675, 31551), (809, 26325), (975, 21843), (1053, 20225), (1755, 12135), (2025, 10517), (2427, 8775), (2925, 7281), (4045, 5265)]