21007080

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{367}}^1$

素因数の和:440

約数の個数: 128

約数和(自身を含む): 71539200

約数和(自身を除く): 50532120

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 53, 54, 60, 72, 90, 106, 108, 120, 135, 159, 180, 212, 216, 265, 270, 318, 360, 367, 424, 477, 530, 540, 636, 734, 795, 954, 1060, 1080, 1101, 1272, 1431, 1468, 1590, 1835, 1908, 2120, 2202, 2385, 2862, 2936, 3180, 3303, 3670, 3816, 4404, 4770, 5505, 5724, 6360, 6606, 7155, 7340, 8808, 9540, 9909, 11010, 11448, 13212, 14310, 14680, 16515, 19080, 19451, 19818, 22020, 26424, 28620, 33030, 38902, 39636, 44040, 49545, 57240, 58353, 66060, 77804, 79272, 97255, 99090, 116706, 132120, 155608, 175059, 194510, 198180, 233412, 291765, 350118, 389020, 396360, 466824, 525177, 583530, 700236, 778040, 875295, 1050354, 1167060, 1400472, 1750590, 2100708, 2334120, 2625885, 3501180, 4201416, 5251770, 7002360, 10503540, 21007080]

約数ペア:

[(1, 21007080), (2, 10503540), (3, 7002360), (4, 5251770), (5, 4201416), (6, 3501180), (8, 2625885), (9, 2334120), (10, 2100708), (12, 1750590), (15, 1400472), (18, 1167060), (20, 1050354), (24, 875295), (27, 778040), (30, 700236), (36, 583530), (40, 525177), (45, 466824), (53, 396360), (54, 389020), (60, 350118), (72, 291765), (90, 233412), (106, 198180), (108, 194510), (120, 175059), (135, 155608), (159, 132120), (180, 116706), (212, 99090), (216, 97255), (265, 79272), (270, 77804), (318, 66060), (360, 58353), (367, 57240), (424, 49545), (477, 44040), (530, 39636), (540, 38902), (636, 33030), (734, 28620), (795, 26424), (954, 22020), (1060, 19818), (1080, 19451), (1101, 19080), (1272, 16515), (1431, 14680), (1468, 14310), (1590, 13212), (1835, 11448), (1908, 11010), (2120, 9909), (2202, 9540), (2385, 8808), (2862, 7340), (2936, 7155), (3180, 6606), (3303, 6360), (3670, 5724), (3816, 5505), (4404, 4770)]