21981420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4211}}^1$

素因数の和:4255

約数の個数: 72

約数和(自身を含む): 68992560

約数和(自身を除く): 47011140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 4211, 5220, 8422, 12633, 16844, 21055, 25266, 37899, 42110, 50532, 63165, 75798, 84220, 122119, 126330, 151596, 189495, 244238, 252660, 366357, 378990, 488476, 610595, 732714, 757980, 1099071, 1221190, 1465428, 1831785, 2198142, 2442380, 3663570, 4396284, 5495355, 7327140, 10990710, 21981420]

約数ペア:

[(1, 21981420), (2, 10990710), (3, 7327140), (4, 5495355), (5, 4396284), (6, 3663570), (9, 2442380), (10, 2198142), (12, 1831785), (15, 1465428), (18, 1221190), (20, 1099071), (29, 757980), (30, 732714), (36, 610595), (45, 488476), (58, 378990), (60, 366357), (87, 252660), (90, 244238), (116, 189495), (145, 151596), (174, 126330), (180, 122119), (261, 84220), (290, 75798), (348, 63165), (435, 50532), (522, 42110), (580, 37899), (870, 25266), (1044, 21055), (1305, 16844), (1740, 12633), (2610, 8422), (4211, 5220)]