21900780

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1229}}^1$

素因数の和:1261

約数の個数: 120

約数和(自身を含む): 75010320

約数和(自身を除く): 53109540

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 27, 30, 33, 36, 44, 45, 54, 55, 60, 66, 81, 90, 99, 108, 110, 132, 135, 162, 165, 180, 198, 220, 270, 297, 324, 330, 396, 405, 495, 540, 594, 660, 810, 891, 990, 1188, 1229, 1485, 1620, 1782, 1980, 2458, 2970, 3564, 3687, 4455, 4916, 5940, 6145, 7374, 8910, 11061, 12290, 13519, 14748, 17820, 18435, 22122, 24580, 27038, 33183, 36870, 40557, 44244, 54076, 55305, 66366, 67595, 73740, 81114, 99549, 110610, 121671, 132732, 135190, 162228, 165915, 199098, 202785, 221220, 243342, 270380, 331830, 365013, 398196, 405570, 486684, 497745, 608355, 663660, 730026, 811140, 995490, 1095039, 1216710, 1460052, 1825065, 1990980, 2190078, 2433420, 3650130, 4380156, 5475195, 7300260, 10950390, 21900780]

約数ペア:

[(1, 21900780), (2, 10950390), (3, 7300260), (4, 5475195), (5, 4380156), (6, 3650130), (9, 2433420), (10, 2190078), (11, 1990980), (12, 1825065), (15, 1460052), (18, 1216710), (20, 1095039), (22, 995490), (27, 811140), (30, 730026), (33, 663660), (36, 608355), (44, 497745), (45, 486684), (54, 405570), (55, 398196), (60, 365013), (66, 331830), (81, 270380), (90, 243342), (99, 221220), (108, 202785), (110, 199098), (132, 165915), (135, 162228), (162, 135190), (165, 132732), (180, 121671), (198, 110610), (220, 99549), (270, 81114), (297, 73740), (324, 67595), (330, 66366), (396, 55305), (405, 54076), (495, 44244), (540, 40557), (594, 36870), (660, 33183), (810, 27038), (891, 24580), (990, 22122), (1188, 18435), (1229, 17820), (1485, 14748), (1620, 13519), (1782, 12290), (1980, 11061), (2458, 8910), (2970, 7374), (3564, 6145), (3687, 5940), (4455, 4916)]