21085236

素因数分解:

$2^2\times 3^2\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1$

素因数の和:421

約数の個数: 72

約数和(自身を含む): 57081024

約数和(自身を除く): 35995788

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 34, 36, 51, 68, 102, 131, 153, 204, 262, 263, 306, 393, 524, 526, 612, 786, 789, 1052, 1179, 1572, 1578, 2227, 2358, 2367, 3156, 4454, 4471, 4716, 4734, 6681, 8908, 8942, 9468, 13362, 13413, 17884, 20043, 26724, 26826, 34453, 40086, 40239, 53652, 68906, 80172, 80478, 103359, 137812, 160956, 206718, 310077, 413436, 585701, 620154, 1171402, 1240308, 1757103, 2342804, 3514206, 5271309, 7028412, 10542618, 21085236]

約数ペア:

[(1, 21085236), (2, 10542618), (3, 7028412), (4, 5271309), (6, 3514206), (9, 2342804), (12, 1757103), (17, 1240308), (18, 1171402), (34, 620154), (36, 585701), (51, 413436), (68, 310077), (102, 206718), (131, 160956), (153, 137812), (204, 103359), (262, 80478), (263, 80172), (306, 68906), (393, 53652), (524, 40239), (526, 40086), (612, 34453), (786, 26826), (789, 26724), (1052, 20043), (1179, 17884), (1572, 13413), (1578, 13362), (2227, 9468), (2358, 8942), (2367, 8908), (3156, 6681), (4454, 4734), (4471, 4716)]