28784840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{461}}^1$

素因数の和:702

約数の個数: 64

約数和(自身を含む): 74511360

約数和(自身を除く): 45726520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 223, 280, 446, 461, 892, 922, 1115, 1561, 1784, 1844, 2230, 2305, 3122, 3227, 3688, 4460, 4610, 6244, 6454, 7805, 8920, 9220, 12488, 12908, 15610, 16135, 18440, 25816, 31220, 32270, 62440, 64540, 102803, 129080, 205606, 411212, 514015, 719621, 822424, 1028030, 1439242, 2056060, 2878484, 3598105, 4112120, 5756968, 7196210, 14392420, 28784840]

約数ペア:

[(1, 28784840), (2, 14392420), (4, 7196210), (5, 5756968), (7, 4112120), (8, 3598105), (10, 2878484), (14, 2056060), (20, 1439242), (28, 1028030), (35, 822424), (40, 719621), (56, 514015), (70, 411212), (140, 205606), (223, 129080), (280, 102803), (446, 64540), (461, 62440), (892, 32270), (922, 31220), (1115, 25816), (1561, 18440), (1784, 16135), (1844, 15610), (2230, 12908), (2305, 12488), (3122, 9220), (3227, 8920), (3688, 7805), (4460, 6454), (4610, 6244)]