20903355

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^3\times {\mathrm{349}}^1$

素因数の和:393

約数の個数: 48

約数和(自身を含む): 39967200

約数和(自身を除く): 19063845

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 121, 165, 349, 363, 495, 605, 1047, 1089, 1331, 1745, 1815, 3141, 3839, 3993, 5235, 5445, 6655, 11517, 11979, 15705, 19195, 19965, 34551, 42229, 57585, 59895, 126687, 172755, 211145, 380061, 464519, 633435, 1393557, 1900305, 2322595, 4180671, 6967785, 20903355]

約数ペア:

[(1, 20903355), (3, 6967785), (5, 4180671), (9, 2322595), (11, 1900305), (15, 1393557), (33, 633435), (45, 464519), (55, 380061), (99, 211145), (121, 172755), (165, 126687), (349, 59895), (363, 57585), (495, 42229), (605, 34551), (1047, 19965), (1089, 19195), (1331, 15705), (1745, 11979), (1815, 11517), (3141, 6655), (3839, 5445), (3993, 5235)]