21215520

素因数分解:

$2^5\times 3^4\times 5^1\times {\mathrm{1637}}^1$

素因数の和:1664

約数の個数: 120

約数和(自身を含む): 74918844

約数和(自身を除く): 53703324

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 72, 80, 81, 90, 96, 108, 120, 135, 144, 160, 162, 180, 216, 240, 270, 288, 324, 360, 405, 432, 480, 540, 648, 720, 810, 864, 1080, 1296, 1440, 1620, 1637, 2160, 2592, 3240, 3274, 4320, 4911, 6480, 6548, 8185, 9822, 12960, 13096, 14733, 16370, 19644, 24555, 26192, 29466, 32740, 39288, 44199, 49110, 52384, 58932, 65480, 73665, 78576, 88398, 98220, 117864, 130960, 132597, 147330, 157152, 176796, 196440, 220995, 235728, 261920, 265194, 294660, 353592, 392880, 441990, 471456, 530388, 589320, 662985, 707184, 785760, 883980, 1060776, 1178640, 1325970, 1414368, 1767960, 2121552, 2357280, 2651940, 3535920, 4243104, 5303880, 7071840, 10607760, 21215520]

約数ペア:

[(1, 21215520), (2, 10607760), (3, 7071840), (4, 5303880), (5, 4243104), (6, 3535920), (8, 2651940), (9, 2357280), (10, 2121552), (12, 1767960), (15, 1414368), (16, 1325970), (18, 1178640), (20, 1060776), (24, 883980), (27, 785760), (30, 707184), (32, 662985), (36, 589320), (40, 530388), (45, 471456), (48, 441990), (54, 392880), (60, 353592), (72, 294660), (80, 265194), (81, 261920), (90, 235728), (96, 220995), (108, 196440), (120, 176796), (135, 157152), (144, 147330), (160, 132597), (162, 130960), (180, 117864), (216, 98220), (240, 88398), (270, 78576), (288, 73665), (324, 65480), (360, 58932), (405, 52384), (432, 49110), (480, 44199), (540, 39288), (648, 32740), (720, 29466), (810, 26192), (864, 24555), (1080, 19644), (1296, 16370), (1440, 14733), (1620, 13096), (1637, 12960), (2160, 9822), (2592, 8185), (3240, 6548), (3274, 6480), (4320, 4911)]