20217840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1381}}^1$

素因数の和:1458

約数の個数: 80

約数和(自身を含む): 63748896

約数和(自身を除く): 43531056

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 61, 80, 120, 122, 183, 240, 244, 305, 366, 488, 610, 732, 915, 976, 1220, 1381, 1464, 1830, 2440, 2762, 2928, 3660, 4143, 4880, 5524, 6905, 7320, 8286, 11048, 13810, 14640, 16572, 20715, 22096, 27620, 33144, 41430, 55240, 66288, 82860, 84241, 110480, 165720, 168482, 252723, 331440, 336964, 421205, 505446, 673928, 842410, 1010892, 1263615, 1347856, 1684820, 2021784, 2527230, 3369640, 4043568, 5054460, 6739280, 10108920, 20217840]

約数ペア:

[(1, 20217840), (2, 10108920), (3, 6739280), (4, 5054460), (5, 4043568), (6, 3369640), (8, 2527230), (10, 2021784), (12, 1684820), (15, 1347856), (16, 1263615), (20, 1010892), (24, 842410), (30, 673928), (40, 505446), (48, 421205), (60, 336964), (61, 331440), (80, 252723), (120, 168482), (122, 165720), (183, 110480), (240, 84241), (244, 82860), (305, 66288), (366, 55240), (488, 41430), (610, 33144), (732, 27620), (915, 22096), (976, 20715), (1220, 16572), (1381, 14640), (1464, 13810), (1830, 11048), (2440, 8286), (2762, 7320), (2928, 6905), (3660, 5524), (4143, 4880)]