21318633

素因数分解:

$3^5\times 7^1\times {\mathrm{83}}^1\times {\mathrm{151}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 37180416

約数和(自身を除く): 15861783

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 83, 151, 189, 243, 249, 453, 567, 581, 747, 1057, 1359, 1701, 1743, 2241, 3171, 4077, 5229, 6723, 9513, 12231, 12533, 15687, 20169, 28539, 36693, 37599, 47061, 85617, 87731, 112797, 141183, 256851, 263193, 338391, 789579, 1015173, 2368737, 3045519, 7106211, 21318633]

約数ペア:

[(1, 21318633), (3, 7106211), (7, 3045519), (9, 2368737), (21, 1015173), (27, 789579), (63, 338391), (81, 263193), (83, 256851), (151, 141183), (189, 112797), (243, 87731), (249, 85617), (453, 47061), (567, 37599), (581, 36693), (747, 28539), (1057, 20169), (1359, 15687), (1701, 12533), (1743, 12231), (2241, 9513), (3171, 6723), (4077, 5229)]