21375315

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{599}}^1$

素因数の和:684

約数の個数: 48

約数和(自身を含む): 40622400

約数和(自身を除く): 19247085

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 61, 65, 117, 183, 195, 305, 549, 585, 599, 793, 915, 1797, 2379, 2745, 2995, 3965, 5391, 7137, 7787, 8985, 11895, 23361, 26955, 35685, 36539, 38935, 70083, 109617, 116805, 182695, 328851, 350415, 475007, 548085, 1425021, 1644255, 2375035, 4275063, 7125105, 21375315]

約数ペア:

[(1, 21375315), (3, 7125105), (5, 4275063), (9, 2375035), (13, 1644255), (15, 1425021), (39, 548085), (45, 475007), (61, 350415), (65, 328851), (117, 182695), (183, 116805), (195, 109617), (305, 70083), (549, 38935), (585, 36539), (599, 35685), (793, 26955), (915, 23361), (1797, 11895), (2379, 8985), (2745, 7787), (2995, 7137), (3965, 5391)]