9781812

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 25945920

約数和(自身を除く): 16164108

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 71, 86, 89, 129, 142, 172, 178, 213, 258, 267, 284, 356, 387, 426, 516, 534, 639, 774, 801, 852, 1068, 1278, 1548, 1602, 2556, 3053, 3204, 3827, 6106, 6319, 7654, 9159, 11481, 12212, 12638, 15308, 18318, 18957, 22962, 25276, 27477, 34443, 36636, 37914, 45924, 54954, 56871, 68886, 75828, 109908, 113742, 137772, 227484, 271717, 543434, 815151, 1086868, 1630302, 2445453, 3260604, 4890906, 9781812]

約数ペア:

[(1, 9781812), (2, 4890906), (3, 3260604), (4, 2445453), (6, 1630302), (9, 1086868), (12, 815151), (18, 543434), (36, 271717), (43, 227484), (71, 137772), (86, 113742), (89, 109908), (129, 75828), (142, 68886), (172, 56871), (178, 54954), (213, 45924), (258, 37914), (267, 36636), (284, 34443), (356, 27477), (387, 25276), (426, 22962), (516, 18957), (534, 18318), (639, 15308), (774, 12638), (801, 12212), (852, 11481), (1068, 9159), (1278, 7654), (1548, 6319), (1602, 6106), (2556, 3827), (3053, 3204)]