21252720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{5209}}^1$

素因数の和:5242

約数の個数: 80

約数和(自身を含む): 69772320

約数和(自身を除く): 48519600

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 40, 48, 51, 60, 68, 80, 85, 102, 120, 136, 170, 204, 240, 255, 272, 340, 408, 510, 680, 816, 1020, 1360, 2040, 4080, 5209, 10418, 15627, 20836, 26045, 31254, 41672, 52090, 62508, 78135, 83344, 88553, 104180, 125016, 156270, 177106, 208360, 250032, 265659, 312540, 354212, 416720, 442765, 531318, 625080, 708424, 885530, 1062636, 1250160, 1328295, 1416848, 1771060, 2125272, 2656590, 3542120, 4250544, 5313180, 7084240, 10626360, 21252720]

約数ペア:

[(1, 21252720), (2, 10626360), (3, 7084240), (4, 5313180), (5, 4250544), (6, 3542120), (8, 2656590), (10, 2125272), (12, 1771060), (15, 1416848), (16, 1328295), (17, 1250160), (20, 1062636), (24, 885530), (30, 708424), (34, 625080), (40, 531318), (48, 442765), (51, 416720), (60, 354212), (68, 312540), (80, 265659), (85, 250032), (102, 208360), (120, 177106), (136, 156270), (170, 125016), (204, 104180), (240, 88553), (255, 83344), (272, 78135), (340, 62508), (408, 52090), (510, 41672), (680, 31254), (816, 26045), (1020, 20836), (1360, 15627), (2040, 10418), (4080, 5209)]