20377980

素因数分解:

$2^2\times 3^5\times 5^1\times 7^1\times {\mathrm{599}}^1$

素因数の和:630

約数の個数: 144

約数和(自身を含む): 73382400

約数和(自身を除く): 53004420

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, 243, 252, 270, 315, 324, 378, 405, 420, 486, 540, 567, 599, 630, 756, 810, 945, 972, 1134, 1198, 1215, 1260, 1620, 1701, 1797, 1890, 2268, 2396, 2430, 2835, 2995, 3402, 3594, 3780, 4193, 4860, 5391, 5670, 5990, 6804, 7188, 8386, 8505, 8985, 10782, 11340, 11980, 12579, 16173, 16772, 17010, 17970, 20965, 21564, 25158, 26955, 32346, 34020, 35940, 37737, 41930, 48519, 50316, 53910, 62895, 64692, 75474, 80865, 83860, 97038, 107820, 113211, 125790, 145557, 150948, 161730, 188685, 194076, 226422, 242595, 251580, 291114, 323460, 339633, 377370, 452844, 485190, 566055, 582228, 679266, 727785, 754740, 970380, 1018899, 1132110, 1358532, 1455570, 1698165, 2037798, 2264220, 2911140, 3396330, 4075596, 5094495, 6792660, 10188990, 20377980]

約数ペア:

[(1, 20377980), (2, 10188990), (3, 6792660), (4, 5094495), (5, 4075596), (6, 3396330), (7, 2911140), (9, 2264220), (10, 2037798), (12, 1698165), (14, 1455570), (15, 1358532), (18, 1132110), (20, 1018899), (21, 970380), (27, 754740), (28, 727785), (30, 679266), (35, 582228), (36, 566055), (42, 485190), (45, 452844), (54, 377370), (60, 339633), (63, 323460), (70, 291114), (81, 251580), (84, 242595), (90, 226422), (105, 194076), (108, 188685), (126, 161730), (135, 150948), (140, 145557), (162, 125790), (180, 113211), (189, 107820), (210, 97038), (243, 83860), (252, 80865), (270, 75474), (315, 64692), (324, 62895), (378, 53910), (405, 50316), (420, 48519), (486, 41930), (540, 37737), (567, 35940), (599, 34020), (630, 32346), (756, 26955), (810, 25158), (945, 21564), (972, 20965), (1134, 17970), (1198, 17010), (1215, 16772), (1260, 16173), (1620, 12579), (1701, 11980), (1797, 11340), (1890, 10782), (2268, 8985), (2396, 8505), (2430, 8386), (2835, 7188), (2995, 6804), (3402, 5990), (3594, 5670), (3780, 5391), (4193, 4860)]