21000273875

素因数分解:

$5^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1\times {\mathrm{4201}}^1$

素因数の和:4449

約数の個数: 64

約数和(自身を含む): 31149930240

約数和(自身を除く): 10149656365

約数列:

[1, 5, 7, 25, 29, 35, 125, 145, 175, 197, 203, 725, 875, 985, 1015, 1379, 3625, 4201, 4925, 5075, 5713, 6895, 21005, 24625, 25375, 28565, 29407, 34475, 39991, 105025, 121829, 142825, 147035, 172375, 199955, 525125, 609145, 714125, 735175, 827597, 852803, 999775, 3045725, 3675875, 4137985, 4264015, 4998875, 5793179, 15228625, 20689925, 21320075, 24000313, 28965895, 103449625, 106600375, 120001565, 144829475, 168002191, 600007825, 724147375, 840010955, 3000039125, 4200054775, 21000273875]

約数ペア:

[(1, 21000273875), (5, 4200054775), (7, 3000039125), (25, 840010955), (29, 724147375), (35, 600007825), (125, 168002191), (145, 144829475), (175, 120001565), (197, 106600375), (203, 103449625), (725, 28965895), (875, 24000313), (985, 21320075), (1015, 20689925), (1379, 15228625), (3625, 5793179), (4201, 4998875), (4925, 4264015), (5075, 4137985), (5713, 3675875), (6895, 3045725), (21005, 999775), (24625, 852803), (25375, 827597), (28565, 735175), (29407, 714125), (34475, 609145), (39991, 525125), (105025, 199955), (121829, 172375), (142825, 147035)]