21383880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25457}}^1$

素因数の和:25478

約数の個数: 64

約数和(自身を含む): 73319040

約数和(自身を除く): 51935160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25457, 50914, 76371, 101828, 127285, 152742, 178199, 203656, 254570, 305484, 356398, 381855, 509140, 534597, 610968, 712796, 763710, 890995, 1018280, 1069194, 1425592, 1527420, 1781990, 2138388, 2672985, 3054840, 3563980, 4276776, 5345970, 7127960, 10691940, 21383880]

約数ペア:

[(1, 21383880), (2, 10691940), (3, 7127960), (4, 5345970), (5, 4276776), (6, 3563980), (7, 3054840), (8, 2672985), (10, 2138388), (12, 1781990), (14, 1527420), (15, 1425592), (20, 1069194), (21, 1018280), (24, 890995), (28, 763710), (30, 712796), (35, 610968), (40, 534597), (42, 509140), (56, 381855), (60, 356398), (70, 305484), (84, 254570), (105, 203656), (120, 178199), (140, 152742), (168, 127285), (210, 101828), (280, 76371), (420, 50914), (840, 25457)]