21105720

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{2549}}^1$

素因数の和:2589

約数の個数: 96

約数和(自身を含む): 71604000

約数和(自身を除く): 50498280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 23, 24, 30, 36, 40, 45, 46, 60, 69, 72, 90, 92, 115, 120, 138, 180, 184, 207, 230, 276, 345, 360, 414, 460, 552, 690, 828, 920, 1035, 1380, 1656, 2070, 2549, 2760, 4140, 5098, 7647, 8280, 10196, 12745, 15294, 20392, 22941, 25490, 30588, 38235, 45882, 50980, 58627, 61176, 76470, 91764, 101960, 114705, 117254, 152940, 175881, 183528, 229410, 234508, 293135, 305880, 351762, 458820, 469016, 527643, 586270, 703524, 879405, 917640, 1055286, 1172540, 1407048, 1758810, 2110572, 2345080, 2638215, 3517620, 4221144, 5276430, 7035240, 10552860, 21105720]

約数ペア:

[(1, 21105720), (2, 10552860), (3, 7035240), (4, 5276430), (5, 4221144), (6, 3517620), (8, 2638215), (9, 2345080), (10, 2110572), (12, 1758810), (15, 1407048), (18, 1172540), (20, 1055286), (23, 917640), (24, 879405), (30, 703524), (36, 586270), (40, 527643), (45, 469016), (46, 458820), (60, 351762), (69, 305880), (72, 293135), (90, 234508), (92, 229410), (115, 183528), (120, 175881), (138, 152940), (180, 117254), (184, 114705), (207, 101960), (230, 91764), (276, 76470), (345, 61176), (360, 58627), (414, 50980), (460, 45882), (552, 38235), (690, 30588), (828, 25490), (920, 22941), (1035, 20392), (1380, 15294), (1656, 12745), (2070, 10196), (2549, 8280), (2760, 7647), (4140, 5098)]