20721708

素因数分解:

$2^2\times 3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{691}}^1$

素因数の和:732

約数の個数: 108

約数和(自身を含む): 64609272

約数和(自身を除く): 43887564

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 17, 18, 21, 28, 34, 36, 42, 49, 51, 63, 68, 84, 98, 102, 119, 126, 147, 153, 196, 204, 238, 252, 294, 306, 357, 441, 476, 588, 612, 691, 714, 833, 882, 1071, 1382, 1428, 1666, 1764, 2073, 2142, 2499, 2764, 3332, 4146, 4284, 4837, 4998, 6219, 7497, 8292, 9674, 9996, 11747, 12438, 14511, 14994, 19348, 23494, 24876, 29022, 29988, 33859, 35241, 43533, 46988, 58044, 67718, 70482, 82229, 87066, 101577, 105723, 135436, 140964, 164458, 174132, 203154, 211446, 246687, 304731, 328916, 406308, 422892, 493374, 575603, 609462, 740061, 986748, 1151206, 1218924, 1480122, 1726809, 2302412, 2960244, 3453618, 5180427, 6907236, 10360854, 20721708]

約数ペア:

[(1, 20721708), (2, 10360854), (3, 6907236), (4, 5180427), (6, 3453618), (7, 2960244), (9, 2302412), (12, 1726809), (14, 1480122), (17, 1218924), (18, 1151206), (21, 986748), (28, 740061), (34, 609462), (36, 575603), (42, 493374), (49, 422892), (51, 406308), (63, 328916), (68, 304731), (84, 246687), (98, 211446), (102, 203154), (119, 174132), (126, 164458), (147, 140964), (153, 135436), (196, 105723), (204, 101577), (238, 87066), (252, 82229), (294, 70482), (306, 67718), (357, 58044), (441, 46988), (476, 43533), (588, 35241), (612, 33859), (691, 29988), (714, 29022), (833, 24876), (882, 23494), (1071, 19348), (1382, 14994), (1428, 14511), (1666, 12438), (1764, 11747), (2073, 9996), (2142, 9674), (2499, 8292), (2764, 7497), (3332, 6219), (4146, 4998), (4284, 4837)]