20489505

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4229}}^1$

素因数の和:4273

約数の個数: 32

約数和(自身を含む): 36547200

約数和(自身を除く): 16057695

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 255, 285, 323, 969, 1615, 4229, 4845, 12687, 21145, 63435, 71893, 80351, 215679, 241053, 359465, 401755, 1078395, 1205265, 1365967, 4097901, 6829835, 20489505]

約数ペア:

[(1, 20489505), (3, 6829835), (5, 4097901), (15, 1365967), (17, 1205265), (19, 1078395), (51, 401755), (57, 359465), (85, 241053), (95, 215679), (255, 80351), (285, 71893), (323, 63435), (969, 21145), (1615, 12687), (4229, 4845)]