20917806

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{421}}^1$

素因数の和:466

約数の個数: 72

約数和(自身を含む): 52822584

約数和(自身を除く): 31904778

約数列:

[1, 2, 3, 6, 7, 13, 14, 21, 26, 39, 42, 49, 78, 91, 98, 147, 169, 182, 273, 294, 338, 421, 507, 546, 637, 842, 1014, 1183, 1263, 1274, 1911, 2366, 2526, 2947, 3549, 3822, 5473, 5894, 7098, 8281, 8841, 10946, 16419, 16562, 17682, 20629, 24843, 32838, 38311, 41258, 49686, 61887, 71149, 76622, 114933, 123774, 142298, 213447, 229866, 268177, 426894, 498043, 536354, 804531, 996086, 1494129, 1609062, 2988258, 3486301, 6972602, 10458903, 20917806]

約数ペア:

[(1, 20917806), (2, 10458903), (3, 6972602), (6, 3486301), (7, 2988258), (13, 1609062), (14, 1494129), (21, 996086), (26, 804531), (39, 536354), (42, 498043), (49, 426894), (78, 268177), (91, 229866), (98, 213447), (147, 142298), (169, 123774), (182, 114933), (273, 76622), (294, 71149), (338, 61887), (421, 49686), (507, 41258), (546, 38311), (637, 32838), (842, 24843), (1014, 20629), (1183, 17682), (1263, 16562), (1274, 16419), (1911, 10946), (2366, 8841), (2526, 8281), (2947, 7098), (3549, 5894), (3822, 5473)]