1288720

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:283

約数の個数: 40

約数和(自身を含む): 3046680

約数和(自身を除く): 1757960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 181, 356, 362, 445, 712, 724, 890, 905, 1424, 1448, 1780, 1810, 2896, 3560, 3620, 7120, 7240, 14480, 16109, 32218, 64436, 80545, 128872, 161090, 257744, 322180, 644360, 1288720]

約数ペア:

[(1, 1288720), (2, 644360), (4, 322180), (5, 257744), (8, 161090), (10, 128872), (16, 80545), (20, 64436), (40, 32218), (80, 16109), (89, 14480), (178, 7240), (181, 7120), (356, 3620), (362, 3560), (445, 2896), (712, 1810), (724, 1780), (890, 1448), (905, 1424)]