21211515

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{359}}^1$

素因数の和:484

約数の個数: 48

約数和(自身を含む): 40098240

約数和(自身を除く): 18886725

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 101, 117, 195, 303, 359, 505, 585, 909, 1077, 1313, 1515, 1795, 3231, 3939, 4545, 4667, 5385, 6565, 11817, 14001, 16155, 19695, 23335, 36259, 42003, 59085, 70005, 108777, 181295, 210015, 326331, 471367, 543885, 1414101, 1631655, 2356835, 4242303, 7070505, 21211515]

約数ペア:

[(1, 21211515), (3, 7070505), (5, 4242303), (9, 2356835), (13, 1631655), (15, 1414101), (39, 543885), (45, 471367), (65, 326331), (101, 210015), (117, 181295), (195, 108777), (303, 70005), (359, 59085), (505, 42003), (585, 36259), (909, 23335), (1077, 19695), (1313, 16155), (1515, 14001), (1795, 11817), (3231, 6565), (3939, 5385), (4545, 4667)]