21131415

素因数分解:

$3^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{997}}^1$

素因数の和:1168

約数の個数: 32

約数和(自身を含む): 37844160

約数和(自身を除く): 16712745

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157, 471, 785, 997, 1413, 2355, 2991, 4239, 4985, 7065, 8973, 14955, 21195, 26919, 44865, 134595, 156529, 469587, 782645, 1408761, 2347935, 4226283, 7043805, 21131415]

約数ペア:

[(1, 21131415), (3, 7043805), (5, 4226283), (9, 2347935), (15, 1408761), (27, 782645), (45, 469587), (135, 156529), (157, 134595), (471, 44865), (785, 26919), (997, 21195), (1413, 14955), (2355, 8973), (2991, 7065), (4239, 4985)]