21621704

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1$

素因数の和:222

約数の個数: 64

約数和(自身を含む): 46267200

約数和(自身を除く): 24645496

約数列:

[1, 2, 4, 8, 13, 26, 29, 52, 58, 67, 104, 107, 116, 134, 214, 232, 268, 377, 428, 536, 754, 856, 871, 1391, 1508, 1742, 1943, 2782, 3016, 3103, 3484, 3886, 5564, 6206, 6968, 7169, 7772, 11128, 12412, 14338, 15544, 24824, 25259, 28676, 40339, 50518, 57352, 80678, 93197, 101036, 161356, 186394, 202072, 207901, 322712, 372788, 415802, 745576, 831604, 1663208, 2702713, 5405426, 10810852, 21621704]

約数ペア:

[(1, 21621704), (2, 10810852), (4, 5405426), (8, 2702713), (13, 1663208), (26, 831604), (29, 745576), (52, 415802), (58, 372788), (67, 322712), (104, 207901), (107, 202072), (116, 186394), (134, 161356), (214, 101036), (232, 93197), (268, 80678), (377, 57352), (428, 50518), (536, 40339), (754, 28676), (856, 25259), (871, 24824), (1391, 15544), (1508, 14338), (1742, 12412), (1943, 11128), (2782, 7772), (3016, 7169), (3103, 6968), (3484, 6206), (3886, 5564)]