21355180

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{283}}^1$

素因数の和:324

約数の個数: 96

約数和(自身を含む): 57254400

約数和(自身を除く): 35899220

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 283, 308, 343, 385, 490, 539, 566, 686, 770, 980, 1078, 1132, 1372, 1415, 1540, 1715, 1981, 2156, 2695, 2830, 3113, 3430, 3773, 3962, 5390, 5660, 6226, 6860, 7546, 7924, 9905, 10780, 12452, 13867, 15092, 15565, 18865, 19810, 21791, 27734, 31130, 37730, 39620, 43582, 55468, 62260, 69335, 75460, 87164, 97069, 108955, 138670, 152537, 194138, 217910, 277340, 305074, 388276, 435820, 485345, 610148, 762685, 970690, 1067759, 1525370, 1941380, 2135518, 3050740, 4271036, 5338795, 10677590, 21355180]

約数ペア:

[(1, 21355180), (2, 10677590), (4, 5338795), (5, 4271036), (7, 3050740), (10, 2135518), (11, 1941380), (14, 1525370), (20, 1067759), (22, 970690), (28, 762685), (35, 610148), (44, 485345), (49, 435820), (55, 388276), (70, 305074), (77, 277340), (98, 217910), (110, 194138), (140, 152537), (154, 138670), (196, 108955), (220, 97069), (245, 87164), (283, 75460), (308, 69335), (343, 62260), (385, 55468), (490, 43582), (539, 39620), (566, 37730), (686, 31130), (770, 27734), (980, 21791), (1078, 19810), (1132, 18865), (1372, 15565), (1415, 15092), (1540, 13867), (1715, 12452), (1981, 10780), (2156, 9905), (2695, 7924), (2830, 7546), (3113, 6860), (3430, 6226), (3773, 5660), (3962, 5390)]