21000815475

素因数分解:

$3^1\times 5^2\times {\mathrm{59}}^1\times {\mathrm{881}}^1\times {\mathrm{5387}}^1$

素因数の和:6340

約数の個数: 48

約数和(自身を含む): 35356487040

約数和(自身を除く): 14355671565

約数列:

[1, 3, 5, 15, 25, 59, 75, 177, 295, 881, 885, 1475, 2643, 4405, 4425, 5387, 13215, 16161, 22025, 26935, 51979, 66075, 80805, 134675, 155937, 259895, 317833, 404025, 779685, 953499, 1299475, 1589165, 3898425, 4745947, 4767495, 7945825, 14237841, 23729735, 23837475, 71189205, 118648675, 280010873, 355946025, 840032619, 1400054365, 4200163095, 7000271825, 21000815475]

約数ペア:

[(1, 21000815475), (3, 7000271825), (5, 4200163095), (15, 1400054365), (25, 840032619), (59, 355946025), (75, 280010873), (177, 118648675), (295, 71189205), (881, 23837475), (885, 23729735), (1475, 14237841), (2643, 7945825), (4405, 4767495), (4425, 4745947), (5387, 3898425), (13215, 1589165), (16161, 1299475), (22025, 953499), (26935, 779685), (51979, 404025), (66075, 317833), (80805, 259895), (134675, 155937)]