19444720

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2731}}^1$

素因数の和:2833

約数の個数: 40

約数和(自身を含む): 45733680

約数和(自身を除く): 26288960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2731, 3560, 5462, 7120, 10924, 13655, 21848, 27310, 43696, 54620, 109240, 218480, 243059, 486118, 972236, 1215295, 1944472, 2430590, 3888944, 4861180, 9722360, 19444720]

約数ペア:

[(1, 19444720), (2, 9722360), (4, 4861180), (5, 3888944), (8, 2430590), (10, 1944472), (16, 1215295), (20, 972236), (40, 486118), (80, 243059), (89, 218480), (178, 109240), (356, 54620), (445, 43696), (712, 27310), (890, 21848), (1424, 13655), (1780, 10924), (2731, 7120), (3560, 5462)]