21002040

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{227}}^1\times {\mathrm{257}}^1$

素因数の和:501

約数の個数: 96

約数和(自身を含む): 68824080

約数和(自身を除く): 47822040

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 227, 257, 360, 454, 514, 681, 771, 908, 1028, 1135, 1285, 1362, 1542, 1816, 2043, 2056, 2270, 2313, 2570, 2724, 3084, 3405, 3855, 4086, 4540, 4626, 5140, 5448, 6168, 6810, 7710, 8172, 9080, 9252, 10215, 10280, 11565, 13620, 15420, 16344, 18504, 20430, 23130, 27240, 30840, 40860, 46260, 58339, 81720, 92520, 116678, 175017, 233356, 291695, 350034, 466712, 525051, 583390, 700068, 875085, 1050102, 1166780, 1400136, 1750170, 2100204, 2333560, 2625255, 3500340, 4200408, 5250510, 7000680, 10501020, 21002040]

約数ペア:

[(1, 21002040), (2, 10501020), (3, 7000680), (4, 5250510), (5, 4200408), (6, 3500340), (8, 2625255), (9, 2333560), (10, 2100204), (12, 1750170), (15, 1400136), (18, 1166780), (20, 1050102), (24, 875085), (30, 700068), (36, 583390), (40, 525051), (45, 466712), (60, 350034), (72, 291695), (90, 233356), (120, 175017), (180, 116678), (227, 92520), (257, 81720), (360, 58339), (454, 46260), (514, 40860), (681, 30840), (771, 27240), (908, 23130), (1028, 20430), (1135, 18504), (1285, 16344), (1362, 15420), (1542, 13620), (1816, 11565), (2043, 10280), (2056, 10215), (2270, 9252), (2313, 9080), (2570, 8172), (2724, 7710), (3084, 6810), (3405, 6168), (3855, 5448), (4086, 5140), (4540, 4626)]