1021280

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{491}}^1$

素因数の和:519

約数の個数: 48

約数和(自身を含む): 2603664

約数和(自身を除く): 1582384

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 491, 520, 982, 1040, 1964, 2080, 2455, 3928, 4910, 6383, 7856, 9820, 12766, 15712, 19640, 25532, 31915, 39280, 51064, 63830, 78560, 102128, 127660, 204256, 255320, 510640, 1021280]

約数ペア:

[(1, 1021280), (2, 510640), (4, 255320), (5, 204256), (8, 127660), (10, 102128), (13, 78560), (16, 63830), (20, 51064), (26, 39280), (32, 31915), (40, 25532), (52, 19640), (65, 15712), (80, 12766), (104, 9820), (130, 7856), (160, 6383), (208, 4910), (260, 3928), (416, 2455), (491, 2080), (520, 1964), (982, 1040)]