21239820

素因数分解:

$2^2\times 3^4\times 5^1\times 7^1\times {\mathrm{1873}}^1$

素因数の和:1901

約数の個数: 120

約数和(自身を含む): 76189344

約数和(自身を除く): 54949524

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 81, 84, 90, 105, 108, 126, 135, 140, 162, 180, 189, 210, 252, 270, 315, 324, 378, 405, 420, 540, 567, 630, 756, 810, 945, 1134, 1260, 1620, 1873, 1890, 2268, 2835, 3746, 3780, 5619, 5670, 7492, 9365, 11238, 11340, 13111, 16857, 18730, 22476, 26222, 28095, 33714, 37460, 39333, 50571, 52444, 56190, 65555, 67428, 78666, 84285, 101142, 112380, 117999, 131110, 151713, 157332, 168570, 196665, 202284, 235998, 252855, 262220, 303426, 337140, 353997, 393330, 471996, 505710, 589995, 606852, 707994, 758565, 786660, 1011420, 1061991, 1179990, 1415988, 1517130, 1769985, 2123982, 2359980, 3034260, 3539970, 4247964, 5309955, 7079940, 10619910, 21239820]

約数ペア:

[(1, 21239820), (2, 10619910), (3, 7079940), (4, 5309955), (5, 4247964), (6, 3539970), (7, 3034260), (9, 2359980), (10, 2123982), (12, 1769985), (14, 1517130), (15, 1415988), (18, 1179990), (20, 1061991), (21, 1011420), (27, 786660), (28, 758565), (30, 707994), (35, 606852), (36, 589995), (42, 505710), (45, 471996), (54, 393330), (60, 353997), (63, 337140), (70, 303426), (81, 262220), (84, 252855), (90, 235998), (105, 202284), (108, 196665), (126, 168570), (135, 157332), (140, 151713), (162, 131110), (180, 117999), (189, 112380), (210, 101142), (252, 84285), (270, 78666), (315, 67428), (324, 65555), (378, 56190), (405, 52444), (420, 50571), (540, 39333), (567, 37460), (630, 33714), (756, 28095), (810, 26222), (945, 22476), (1134, 18730), (1260, 16857), (1620, 13111), (1873, 11340), (1890, 11238), (2268, 9365), (2835, 7492), (3746, 5670), (3780, 5619)]