21217788

素因数分解:

$2^2\times 3^5\times {\mathrm{83}}^1\times {\mathrm{263}}^1$

素因数の和:365

約数の個数: 72

約数和(自身を含む): 56504448

約数和(自身を除く): 35286660

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 83, 108, 162, 166, 243, 249, 263, 324, 332, 486, 498, 526, 747, 789, 972, 996, 1052, 1494, 1578, 2241, 2367, 2988, 3156, 4482, 4734, 6723, 7101, 8964, 9468, 13446, 14202, 20169, 21303, 21829, 26892, 28404, 40338, 42606, 43658, 63909, 65487, 80676, 85212, 87316, 127818, 130974, 196461, 255636, 261948, 392922, 589383, 785844, 1178766, 1768149, 2357532, 3536298, 5304447, 7072596, 10608894, 21217788]

約数ペア:

[(1, 21217788), (2, 10608894), (3, 7072596), (4, 5304447), (6, 3536298), (9, 2357532), (12, 1768149), (18, 1178766), (27, 785844), (36, 589383), (54, 392922), (81, 261948), (83, 255636), (108, 196461), (162, 130974), (166, 127818), (243, 87316), (249, 85212), (263, 80676), (324, 65487), (332, 63909), (486, 43658), (498, 42606), (526, 40338), (747, 28404), (789, 26892), (972, 21829), (996, 21303), (1052, 20169), (1494, 14202), (1578, 13446), (2241, 9468), (2367, 8964), (2988, 7101), (3156, 6723), (4482, 4734)]