20985744

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^3\times {\mathrm{199}}^1$

素因数の和:249

約数の個数: 80

約数和(自身を含む): 59024000

約数和(自身を除く): 38038256

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 78, 104, 156, 169, 199, 208, 312, 338, 398, 507, 597, 624, 676, 796, 1014, 1194, 1352, 1592, 2028, 2197, 2388, 2587, 2704, 3184, 4056, 4394, 4776, 5174, 6591, 7761, 8112, 8788, 9552, 10348, 13182, 15522, 17576, 20696, 26364, 31044, 33631, 35152, 41392, 52728, 62088, 67262, 100893, 105456, 124176, 134524, 201786, 269048, 403572, 437203, 538096, 807144, 874406, 1311609, 1614288, 1748812, 2623218, 3497624, 5246436, 6995248, 10492872, 20985744]

約数ペア:

[(1, 20985744), (2, 10492872), (3, 6995248), (4, 5246436), (6, 3497624), (8, 2623218), (12, 1748812), (13, 1614288), (16, 1311609), (24, 874406), (26, 807144), (39, 538096), (48, 437203), (52, 403572), (78, 269048), (104, 201786), (156, 134524), (169, 124176), (199, 105456), (208, 100893), (312, 67262), (338, 62088), (398, 52728), (507, 41392), (597, 35152), (624, 33631), (676, 31044), (796, 26364), (1014, 20696), (1194, 17576), (1352, 15522), (1592, 13182), (2028, 10348), (2197, 9552), (2388, 8788), (2587, 8112), (2704, 7761), (3184, 6591), (4056, 5174), (4394, 4776)]