20797840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37139}}^1$

素因数の和:37159

約数の個数: 40

約数和(自身を含む): 55264320

約数和(自身を除く): 34466480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37139, 74278, 148556, 185695, 259973, 297112, 371390, 519946, 594224, 742780, 1039892, 1299865, 1485560, 2079784, 2599730, 2971120, 4159568, 5199460, 10398920, 20797840]

約数ペア:

[(1, 20797840), (2, 10398920), (4, 5199460), (5, 4159568), (7, 2971120), (8, 2599730), (10, 2079784), (14, 1485560), (16, 1299865), (20, 1039892), (28, 742780), (35, 594224), (40, 519946), (56, 371390), (70, 297112), (80, 259973), (112, 185695), (140, 148556), (280, 74278), (560, 37139)]