21203775

素因数分解:

$3^4\times 5^2\times {\mathrm{37}}^1\times {\mathrm{283}}^1$

素因数の和:342

約数の個数: 60

約数和(自身を含む): 40480792

約数和(自身を除く): 19277017

約数列:

[1, 3, 5, 9, 15, 25, 27, 37, 45, 75, 81, 111, 135, 185, 225, 283, 333, 405, 555, 675, 849, 925, 999, 1415, 1665, 2025, 2547, 2775, 2997, 4245, 4995, 7075, 7641, 8325, 10471, 12735, 14985, 21225, 22923, 24975, 31413, 38205, 52355, 63675, 74925, 94239, 114615, 157065, 191025, 261775, 282717, 471195, 573075, 785325, 848151, 1413585, 2355975, 4240755, 7067925, 21203775]

約数ペア:

[(1, 21203775), (3, 7067925), (5, 4240755), (9, 2355975), (15, 1413585), (25, 848151), (27, 785325), (37, 573075), (45, 471195), (75, 282717), (81, 261775), (111, 191025), (135, 157065), (185, 114615), (225, 94239), (283, 74925), (333, 63675), (405, 52355), (555, 38205), (675, 31413), (849, 24975), (925, 22923), (999, 21225), (1415, 14985), (1665, 12735), (2025, 10471), (2547, 8325), (2775, 7641), (2997, 7075), (4245, 4995)]