21205548

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{6473}}^1$

素因数の和:6503

約数の個数: 72

約数和(自身を含む): 65983008

約数和(自身を除く): 44777460

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 13, 14, 18, 21, 26, 28, 36, 39, 42, 52, 63, 78, 84, 91, 117, 126, 156, 182, 234, 252, 273, 364, 468, 546, 819, 1092, 1638, 3276, 6473, 12946, 19419, 25892, 38838, 45311, 58257, 77676, 84149, 90622, 116514, 135933, 168298, 181244, 233028, 252447, 271866, 336596, 407799, 504894, 543732, 589043, 757341, 815598, 1009788, 1178086, 1514682, 1631196, 1767129, 2356172, 3029364, 3534258, 5301387, 7068516, 10602774, 21205548]

約数ペア:

[(1, 21205548), (2, 10602774), (3, 7068516), (4, 5301387), (6, 3534258), (7, 3029364), (9, 2356172), (12, 1767129), (13, 1631196), (14, 1514682), (18, 1178086), (21, 1009788), (26, 815598), (28, 757341), (36, 589043), (39, 543732), (42, 504894), (52, 407799), (63, 336596), (78, 271866), (84, 252447), (91, 233028), (117, 181244), (126, 168298), (156, 135933), (182, 116514), (234, 90622), (252, 84149), (273, 77676), (364, 58257), (468, 45311), (546, 38838), (819, 25892), (1092, 19419), (1638, 12946), (3276, 6473)]