20541105

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 40138488

約数和(自身を除く): 19597383

約数列:

[1, 3, 5, 9, 13, 15, 37, 39, 45, 65, 73, 111, 117, 169, 185, 195, 219, 333, 365, 481, 507, 555, 585, 657, 845, 949, 1095, 1443, 1521, 1665, 2405, 2535, 2701, 2847, 3285, 4329, 4745, 6253, 7215, 7605, 8103, 8541, 12337, 13505, 14235, 18759, 21645, 24309, 31265, 35113, 37011, 40515, 42705, 56277, 61685, 93795, 105339, 111033, 121545, 175565, 185055, 281385, 316017, 456469, 526695, 555165, 1369407, 1580085, 2282345, 4108221, 6847035, 20541105]

約数ペア:

[(1, 20541105), (3, 6847035), (5, 4108221), (9, 2282345), (13, 1580085), (15, 1369407), (37, 555165), (39, 526695), (45, 456469), (65, 316017), (73, 281385), (111, 185055), (117, 175565), (169, 121545), (185, 111033), (195, 105339), (219, 93795), (333, 61685), (365, 56277), (481, 42705), (507, 40515), (555, 37011), (585, 35113), (657, 31265), (845, 24309), (949, 21645), (1095, 18759), (1443, 14235), (1521, 13505), (1665, 12337), (2405, 8541), (2535, 8103), (2701, 7605), (2847, 7215), (3285, 6253), (4329, 4745)]