21580065

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{997}}^1$

素因数の和:1058

約数の個数: 48

約数和(自身を含む): 41413008

約数和(自身を除く): 19832943

約数列:

[1, 3, 5, 9, 13, 15, 37, 39, 45, 65, 111, 117, 185, 195, 333, 481, 555, 585, 997, 1443, 1665, 2405, 2991, 4329, 4985, 7215, 8973, 12961, 14955, 21645, 36889, 38883, 44865, 64805, 110667, 116649, 184445, 194415, 332001, 479557, 553335, 583245, 1438671, 1660005, 2397785, 4316013, 7193355, 21580065]

約数ペア:

[(1, 21580065), (3, 7193355), (5, 4316013), (9, 2397785), (13, 1660005), (15, 1438671), (37, 583245), (39, 553335), (45, 479557), (65, 332001), (111, 194415), (117, 184445), (185, 116649), (195, 110667), (333, 64805), (481, 44865), (555, 38883), (585, 36889), (997, 21645), (1443, 14955), (1665, 12961), (2405, 8973), (2991, 7215), (4329, 4985)]