19801113

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 28723200

約数和(自身を除く): 8922087

約数列:

[1, 3, 29, 43, 67, 79, 87, 129, 201, 237, 1247, 1943, 2291, 2881, 3397, 3741, 5293, 5829, 6873, 8643, 10191, 15879, 83549, 98513, 153497, 227599, 250647, 295539, 460491, 682797, 6600371, 19801113]

約数ペア:

[(1, 19801113), (3, 6600371), (29, 682797), (43, 460491), (67, 295539), (79, 250647), (87, 227599), (129, 153497), (201, 98513), (237, 83549), (1247, 15879), (1943, 10191), (2291, 8643), (2881, 6873), (3397, 5829), (3741, 5293)]