20418960

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{149}}^1\times {\mathrm{571}}^1$

素因数の和:736

約数の個数: 80

約数和(自身を含む): 63835200

約数和(自身を除く): 43416240

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 149, 240, 298, 447, 571, 596, 745, 894, 1142, 1192, 1490, 1713, 1788, 2235, 2284, 2384, 2855, 2980, 3426, 3576, 4470, 4568, 5710, 5960, 6852, 7152, 8565, 8940, 9136, 11420, 11920, 13704, 17130, 17880, 22840, 27408, 34260, 35760, 45680, 68520, 85079, 137040, 170158, 255237, 340316, 425395, 510474, 680632, 850790, 1020948, 1276185, 1361264, 1701580, 2041896, 2552370, 3403160, 4083792, 5104740, 6806320, 10209480, 20418960]

約数ペア:

[(1, 20418960), (2, 10209480), (3, 6806320), (4, 5104740), (5, 4083792), (6, 3403160), (8, 2552370), (10, 2041896), (12, 1701580), (15, 1361264), (16, 1276185), (20, 1020948), (24, 850790), (30, 680632), (40, 510474), (48, 425395), (60, 340316), (80, 255237), (120, 170158), (149, 137040), (240, 85079), (298, 68520), (447, 45680), (571, 35760), (596, 34260), (745, 27408), (894, 22840), (1142, 17880), (1192, 17130), (1490, 13704), (1713, 11920), (1788, 11420), (2235, 9136), (2284, 8940), (2384, 8565), (2855, 7152), (2980, 6852), (3426, 5960), (3576, 5710), (4470, 4568)]