20635940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{571}}^1$

素因数の和:732

約数の個数: 48

約数和(自身を含む): 47087040

約数和(自身を除く): 26451100

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 139, 260, 278, 556, 571, 695, 1142, 1390, 1807, 2284, 2780, 2855, 3614, 5710, 7228, 7423, 9035, 11420, 14846, 18070, 29692, 36140, 37115, 74230, 79369, 148460, 158738, 317476, 396845, 793690, 1031797, 1587380, 2063594, 4127188, 5158985, 10317970, 20635940]

約数ペア:

[(1, 20635940), (2, 10317970), (4, 5158985), (5, 4127188), (10, 2063594), (13, 1587380), (20, 1031797), (26, 793690), (52, 396845), (65, 317476), (130, 158738), (139, 148460), (260, 79369), (278, 74230), (556, 37115), (571, 36140), (695, 29692), (1142, 18070), (1390, 14846), (1807, 11420), (2284, 9035), (2780, 7423), (2855, 7228), (3614, 5710)]