21420105

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{151}}^1\times {\mathrm{193}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 40339584

約数和(自身を除く): 18919479

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 151, 193, 245, 453, 579, 735, 755, 965, 1057, 1351, 2265, 2895, 3171, 4053, 5285, 6755, 7399, 9457, 15855, 20265, 22197, 28371, 29143, 36995, 47285, 87429, 110985, 141855, 145715, 204001, 437145, 612003, 1020005, 1428007, 3060015, 4284021, 7140035, 21420105]

約数ペア:

[(1, 21420105), (3, 7140035), (5, 4284021), (7, 3060015), (15, 1428007), (21, 1020005), (35, 612003), (49, 437145), (105, 204001), (147, 145715), (151, 141855), (193, 110985), (245, 87429), (453, 47285), (579, 36995), (735, 29143), (755, 28371), (965, 22197), (1057, 20265), (1351, 15855), (2265, 9457), (2895, 7399), (3171, 6755), (4053, 5285)]