21781656

素因数分解:

$2^3\times 3^3\times {\mathrm{13}}^1\times {\mathrm{7757}}^1$

素因数の和:7785

約数の個数: 64

約数和(自身を含む): 65167200

約数和(自身を除く): 43385544

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 18, 24, 26, 27, 36, 39, 52, 54, 72, 78, 104, 108, 117, 156, 216, 234, 312, 351, 468, 702, 936, 1404, 2808, 7757, 15514, 23271, 31028, 46542, 62056, 69813, 93084, 100841, 139626, 186168, 201682, 209439, 279252, 302523, 403364, 418878, 558504, 605046, 806728, 837756, 907569, 1210092, 1675512, 1815138, 2420184, 2722707, 3630276, 5445414, 7260552, 10890828, 21781656]

約数ペア:

[(1, 21781656), (2, 10890828), (3, 7260552), (4, 5445414), (6, 3630276), (8, 2722707), (9, 2420184), (12, 1815138), (13, 1675512), (18, 1210092), (24, 907569), (26, 837756), (27, 806728), (36, 605046), (39, 558504), (52, 418878), (54, 403364), (72, 302523), (78, 279252), (104, 209439), (108, 201682), (117, 186168), (156, 139626), (216, 100841), (234, 93084), (312, 69813), (351, 62056), (468, 46542), (702, 31028), (936, 23271), (1404, 15514), (2808, 7757)]