21821345

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{241}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 32524800

約数和(自身を除く): 10703455

約数列:

[1, 5, 7, 13, 35, 65, 91, 199, 241, 455, 995, 1205, 1393, 1687, 2587, 3133, 6965, 8435, 12935, 15665, 18109, 21931, 47959, 90545, 109655, 239795, 335713, 623467, 1678565, 3117335, 4364269, 21821345]

約数ペア:

[(1, 21821345), (5, 4364269), (7, 3117335), (13, 1678565), (35, 623467), (65, 335713), (91, 239795), (199, 109655), (241, 90545), (455, 47959), (995, 21931), (1205, 18109), (1393, 15665), (1687, 12935), (2587, 8435), (3133, 6965)]