20784465

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{911}}^1$

素因数の和:951

約数の個数: 48

約数和(自身を含む): 40055040

約数和(自身を除く): 19270575

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 117, 135, 169, 195, 351, 507, 585, 845, 911, 1521, 1755, 2535, 2733, 4555, 4563, 7605, 8199, 11843, 13665, 22815, 24597, 35529, 40995, 59215, 106587, 122985, 153959, 177645, 319761, 461877, 532935, 769795, 1385631, 1598805, 2309385, 4156893, 6928155, 20784465]

約数ペア:

[(1, 20784465), (3, 6928155), (5, 4156893), (9, 2309385), (13, 1598805), (15, 1385631), (27, 769795), (39, 532935), (45, 461877), (65, 319761), (117, 177645), (135, 153959), (169, 122985), (195, 106587), (351, 59215), (507, 40995), (585, 35529), (845, 24597), (911, 22815), (1521, 13665), (1755, 11843), (2535, 8199), (2733, 7605), (4555, 4563)]