21289905

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1733}}^1$

素因数の和:1767

約数の個数: 64

約数和(自身を含む): 46609920

約数和(自身を除く): 25320015

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 27, 35, 39, 45, 63, 65, 91, 105, 117, 135, 189, 195, 273, 315, 351, 455, 585, 819, 945, 1365, 1733, 1755, 2457, 4095, 5199, 8665, 12131, 12285, 15597, 22529, 25995, 36393, 46791, 60655, 67587, 77985, 109179, 112645, 157703, 181965, 202761, 233955, 327537, 337935, 473109, 545895, 608283, 788515, 1013805, 1419327, 1637685, 2365545, 3041415, 4257981, 7096635, 21289905]

約数ペア:

[(1, 21289905), (3, 7096635), (5, 4257981), (7, 3041415), (9, 2365545), (13, 1637685), (15, 1419327), (21, 1013805), (27, 788515), (35, 608283), (39, 545895), (45, 473109), (63, 337935), (65, 327537), (91, 233955), (105, 202761), (117, 181965), (135, 157703), (189, 112645), (195, 109179), (273, 77985), (315, 67587), (351, 60655), (455, 46791), (585, 36393), (819, 25995), (945, 22529), (1365, 15597), (1733, 12285), (1755, 12131), (2457, 8665), (4095, 5199)]