21989912

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:336

約数の個数: 64

約数和(自身を含む): 49766400

約数和(自身を除く): 27776488

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 53, 56, 62, 106, 124, 212, 217, 239, 248, 371, 424, 434, 478, 742, 868, 956, 1484, 1643, 1673, 1736, 1912, 2968, 3286, 3346, 6572, 6692, 7409, 11501, 12667, 13144, 13384, 14818, 23002, 25334, 29636, 46004, 50668, 51863, 59272, 88669, 92008, 101336, 103726, 177338, 207452, 354676, 392677, 414904, 709352, 785354, 1570708, 2748739, 3141416, 5497478, 10994956, 21989912]

約数ペア:

[(1, 21989912), (2, 10994956), (4, 5497478), (7, 3141416), (8, 2748739), (14, 1570708), (28, 785354), (31, 709352), (53, 414904), (56, 392677), (62, 354676), (106, 207452), (124, 177338), (212, 103726), (217, 101336), (239, 92008), (248, 88669), (371, 59272), (424, 51863), (434, 50668), (478, 46004), (742, 29636), (868, 25334), (956, 23002), (1484, 14818), (1643, 13384), (1673, 13144), (1736, 12667), (1912, 11501), (2968, 7409), (3286, 6692), (3346, 6572)]