21396440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1789}}^1$

素因数の和:1836

約数の個数: 64

約数和(自身を含む): 54129600

約数和(自身を除く): 32733160

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 40, 46, 52, 65, 92, 104, 115, 130, 184, 230, 260, 299, 460, 520, 598, 920, 1196, 1495, 1789, 2392, 2990, 3578, 5980, 7156, 8945, 11960, 14312, 17890, 23257, 35780, 41147, 46514, 71560, 82294, 93028, 116285, 164588, 186056, 205735, 232570, 329176, 411470, 465140, 534911, 822940, 930280, 1069822, 1645880, 2139644, 2674555, 4279288, 5349110, 10698220, 21396440]

約数ペア:

[(1, 21396440), (2, 10698220), (4, 5349110), (5, 4279288), (8, 2674555), (10, 2139644), (13, 1645880), (20, 1069822), (23, 930280), (26, 822940), (40, 534911), (46, 465140), (52, 411470), (65, 329176), (92, 232570), (104, 205735), (115, 186056), (130, 164588), (184, 116285), (230, 93028), (260, 82294), (299, 71560), (460, 46514), (520, 41147), (598, 35780), (920, 23257), (1196, 17890), (1495, 14312), (1789, 11960), (2392, 8945), (2990, 7156), (3578, 5980)]