21497008

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{571}}^1$

素因数の和:773

約数の個数: 40

約数和(自身を含む): 45181136

約数和(自身を除く): 23684128

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 181, 208, 362, 571, 724, 1142, 1448, 2284, 2353, 2896, 4568, 4706, 7423, 9136, 9412, 14846, 18824, 29692, 37648, 59384, 103351, 118768, 206702, 413404, 826808, 1343563, 1653616, 2687126, 5374252, 10748504, 21497008]

約数ペア:

[(1, 21497008), (2, 10748504), (4, 5374252), (8, 2687126), (13, 1653616), (16, 1343563), (26, 826808), (52, 413404), (104, 206702), (181, 118768), (208, 103351), (362, 59384), (571, 37648), (724, 29692), (1142, 18824), (1448, 14846), (2284, 9412), (2353, 9136), (2896, 7423), (4568, 4706)]