21088920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:185

約数の個数: 128

約数和(自身を含む): 66781440

約数和(自身を除く): 45692520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 43, 60, 61, 67, 86, 120, 122, 129, 134, 172, 183, 201, 215, 244, 258, 268, 305, 335, 344, 366, 402, 430, 488, 516, 536, 610, 645, 670, 732, 804, 860, 915, 1005, 1032, 1220, 1290, 1340, 1464, 1608, 1720, 1830, 2010, 2440, 2580, 2623, 2680, 2881, 3660, 4020, 4087, 5160, 5246, 5762, 7320, 7869, 8040, 8174, 8643, 10492, 11524, 12261, 13115, 14405, 15738, 16348, 17286, 20435, 20984, 23048, 24522, 26230, 28810, 31476, 32696, 34572, 39345, 40870, 43215, 49044, 52460, 57620, 61305, 62952, 69144, 78690, 81740, 86430, 98088, 104920, 115240, 122610, 157380, 163480, 172860, 175741, 245220, 314760, 345720, 351482, 490440, 527223, 702964, 878705, 1054446, 1405928, 1757410, 2108892, 2636115, 3514820, 4217784, 5272230, 7029640, 10544460, 21088920]

約数ペア:

[(1, 21088920), (2, 10544460), (3, 7029640), (4, 5272230), (5, 4217784), (6, 3514820), (8, 2636115), (10, 2108892), (12, 1757410), (15, 1405928), (20, 1054446), (24, 878705), (30, 702964), (40, 527223), (43, 490440), (60, 351482), (61, 345720), (67, 314760), (86, 245220), (120, 175741), (122, 172860), (129, 163480), (134, 157380), (172, 122610), (183, 115240), (201, 104920), (215, 98088), (244, 86430), (258, 81740), (268, 78690), (305, 69144), (335, 62952), (344, 61305), (366, 57620), (402, 52460), (430, 49044), (488, 43215), (516, 40870), (536, 39345), (610, 34572), (645, 32696), (670, 31476), (732, 28810), (804, 26230), (860, 24522), (915, 23048), (1005, 20984), (1032, 20435), (1220, 17286), (1290, 16348), (1340, 15738), (1464, 14405), (1608, 13115), (1720, 12261), (1830, 11524), (2010, 10492), (2440, 8643), (2580, 8174), (2623, 8040), (2680, 7869), (2881, 7320), (3660, 5762), (4020, 5246), (4087, 5160)]