20965464

素因数分解:

$2^3\times 3^2\times {\mathrm{13}}^2\times {\mathrm{1723}}^1$

素因数の和:1761

約数の個数: 72

約数和(自身を含む): 61520940

約数和(自身を除く): 40555476

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 18, 24, 26, 36, 39, 52, 72, 78, 104, 117, 156, 169, 234, 312, 338, 468, 507, 676, 936, 1014, 1352, 1521, 1723, 2028, 3042, 3446, 4056, 5169, 6084, 6892, 10338, 12168, 13784, 15507, 20676, 22399, 31014, 41352, 44798, 62028, 67197, 89596, 124056, 134394, 179192, 201591, 268788, 291187, 403182, 537576, 582374, 806364, 873561, 1164748, 1612728, 1747122, 2329496, 2620683, 3494244, 5241366, 6988488, 10482732, 20965464]

約数ペア:

[(1, 20965464), (2, 10482732), (3, 6988488), (4, 5241366), (6, 3494244), (8, 2620683), (9, 2329496), (12, 1747122), (13, 1612728), (18, 1164748), (24, 873561), (26, 806364), (36, 582374), (39, 537576), (52, 403182), (72, 291187), (78, 268788), (104, 201591), (117, 179192), (156, 134394), (169, 124056), (234, 89596), (312, 67197), (338, 62028), (468, 44798), (507, 41352), (676, 31014), (936, 22399), (1014, 20676), (1352, 15507), (1521, 13784), (1723, 12168), (2028, 10338), (3042, 6892), (3446, 6084), (4056, 5169)]