18659840

素因数分解:

$2^9\times 5^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1$

素因数の和:257

約数の個数: 80

約数和(自身を含む): 46182312

約数和(自身を除く): 27522472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 197, 256, 296, 320, 370, 394, 512, 592, 640, 740, 788, 985, 1184, 1280, 1480, 1576, 1970, 2368, 2560, 2960, 3152, 3940, 4736, 5920, 6304, 7289, 7880, 9472, 11840, 12608, 14578, 15760, 18944, 23680, 25216, 29156, 31520, 36445, 47360, 50432, 58312, 63040, 72890, 94720, 100864, 116624, 126080, 145780, 233248, 252160, 291560, 466496, 504320, 583120, 932992, 1166240, 1865984, 2332480, 3731968, 4664960, 9329920, 18659840]

約数ペア:

[(1, 18659840), (2, 9329920), (4, 4664960), (5, 3731968), (8, 2332480), (10, 1865984), (16, 1166240), (20, 932992), (32, 583120), (37, 504320), (40, 466496), (64, 291560), (74, 252160), (80, 233248), (128, 145780), (148, 126080), (160, 116624), (185, 100864), (197, 94720), (256, 72890), (296, 63040), (320, 58312), (370, 50432), (394, 47360), (512, 36445), (592, 31520), (640, 29156), (740, 25216), (788, 23680), (985, 18944), (1184, 15760), (1280, 14578), (1480, 12608), (1576, 11840), (1970, 9472), (2368, 7880), (2560, 7289), (2960, 6304), (3152, 5920), (3940, 4736)]