21646360

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{197}}^1$

素因数の和:316

約数の個数: 64

約数和(自身を含む): 50893920

約数和(自身を除く): 29247560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 67, 82, 134, 164, 197, 205, 268, 328, 335, 394, 410, 536, 670, 788, 820, 985, 1340, 1576, 1640, 1970, 2680, 2747, 3940, 5494, 7880, 8077, 10988, 13199, 13735, 16154, 21976, 26398, 27470, 32308, 40385, 52796, 54940, 64616, 65995, 80770, 105592, 109880, 131990, 161540, 263980, 323080, 527960, 541159, 1082318, 2164636, 2705795, 4329272, 5411590, 10823180, 21646360]

約数ペア:

[(1, 21646360), (2, 10823180), (4, 5411590), (5, 4329272), (8, 2705795), (10, 2164636), (20, 1082318), (40, 541159), (41, 527960), (67, 323080), (82, 263980), (134, 161540), (164, 131990), (197, 109880), (205, 105592), (268, 80770), (328, 65995), (335, 64616), (394, 54940), (410, 52796), (536, 40385), (670, 32308), (788, 27470), (820, 26398), (985, 21976), (1340, 16154), (1576, 13735), (1640, 13199), (1970, 10988), (2680, 8077), (2747, 7880), (3940, 5494)]