20688780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{227}}^1$

素因数の和:284

約数の個数: 144

約数和(自身を含む): 69866496

約数和(自身を除く): 49177716

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 31, 35, 42, 49, 60, 62, 70, 84, 93, 98, 105, 124, 140, 147, 155, 186, 196, 210, 217, 227, 245, 294, 310, 372, 420, 434, 454, 465, 490, 588, 620, 651, 681, 735, 868, 908, 930, 980, 1085, 1135, 1302, 1362, 1470, 1519, 1589, 1860, 2170, 2270, 2604, 2724, 2940, 3038, 3178, 3255, 3405, 4340, 4540, 4557, 4767, 6076, 6356, 6510, 6810, 7037, 7595, 7945, 9114, 9534, 11123, 13020, 13620, 14074, 15190, 15890, 18228, 19068, 21111, 22246, 22785, 23835, 28148, 30380, 31780, 33369, 35185, 42222, 44492, 45570, 47670, 49259, 55615, 66738, 70370, 84444, 91140, 95340, 98518, 105555, 111230, 133476, 140740, 147777, 166845, 197036, 211110, 222460, 246295, 295554, 333690, 344813, 422220, 492590, 591108, 667380, 689626, 738885, 985180, 1034439, 1379252, 1477770, 1724065, 2068878, 2955540, 3448130, 4137756, 5172195, 6896260, 10344390, 20688780]

約数ペア:

[(1, 20688780), (2, 10344390), (3, 6896260), (4, 5172195), (5, 4137756), (6, 3448130), (7, 2955540), (10, 2068878), (12, 1724065), (14, 1477770), (15, 1379252), (20, 1034439), (21, 985180), (28, 738885), (30, 689626), (31, 667380), (35, 591108), (42, 492590), (49, 422220), (60, 344813), (62, 333690), (70, 295554), (84, 246295), (93, 222460), (98, 211110), (105, 197036), (124, 166845), (140, 147777), (147, 140740), (155, 133476), (186, 111230), (196, 105555), (210, 98518), (217, 95340), (227, 91140), (245, 84444), (294, 70370), (310, 66738), (372, 55615), (420, 49259), (434, 47670), (454, 45570), (465, 44492), (490, 42222), (588, 35185), (620, 33369), (651, 31780), (681, 30380), (735, 28148), (868, 23835), (908, 22785), (930, 22246), (980, 21111), (1085, 19068), (1135, 18228), (1302, 15890), (1362, 15190), (1470, 14074), (1519, 13620), (1589, 13020), (1860, 11123), (2170, 9534), (2270, 9114), (2604, 7945), (2724, 7595), (2940, 7037), (3038, 6810), (3178, 6510), (3255, 6356), (3405, 6076), (4340, 4767), (4540, 4557)]