20008305

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 36386064

約数和(自身を除く): 16377759

約数列:

[1, 3, 5, 9, 15, 37, 45, 61, 111, 183, 185, 197, 305, 333, 549, 555, 591, 915, 985, 1665, 1773, 2257, 2745, 2955, 6771, 7289, 8865, 11285, 12017, 20313, 21867, 33855, 36051, 36445, 60085, 65601, 101565, 108153, 109335, 180255, 328005, 444629, 540765, 1333887, 2223145, 4001661, 6669435, 20008305]

約数ペア:

[(1, 20008305), (3, 6669435), (5, 4001661), (9, 2223145), (15, 1333887), (37, 540765), (45, 444629), (61, 328005), (111, 180255), (183, 109335), (185, 108153), (197, 101565), (305, 65601), (333, 60085), (549, 36445), (555, 36051), (591, 33855), (915, 21867), (985, 20313), (1665, 12017), (1773, 11285), (2257, 8865), (2745, 7289), (2955, 6771)]