21497040

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{409}}^1$

素因数の和:501

約数の個数: 120

約数和(自身を含む): 73362120

約数和(自身を除く): 51865080

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 73, 80, 90, 120, 144, 146, 180, 219, 240, 292, 360, 365, 409, 438, 584, 657, 720, 730, 818, 876, 1095, 1168, 1227, 1314, 1460, 1636, 1752, 2045, 2190, 2454, 2628, 2920, 3272, 3285, 3504, 3681, 4090, 4380, 4908, 5256, 5840, 6135, 6544, 6570, 7362, 8180, 8760, 9816, 10512, 12270, 13140, 14724, 16360, 17520, 18405, 19632, 24540, 26280, 29448, 29857, 32720, 36810, 49080, 52560, 58896, 59714, 73620, 89571, 98160, 119428, 147240, 149285, 179142, 238856, 268713, 294480, 298570, 358284, 447855, 477712, 537426, 597140, 716568, 895710, 1074852, 1194280, 1343565, 1433136, 1791420, 2149704, 2388560, 2687130, 3582840, 4299408, 5374260, 7165680, 10748520, 21497040]

約数ペア:

[(1, 21497040), (2, 10748520), (3, 7165680), (4, 5374260), (5, 4299408), (6, 3582840), (8, 2687130), (9, 2388560), (10, 2149704), (12, 1791420), (15, 1433136), (16, 1343565), (18, 1194280), (20, 1074852), (24, 895710), (30, 716568), (36, 597140), (40, 537426), (45, 477712), (48, 447855), (60, 358284), (72, 298570), (73, 294480), (80, 268713), (90, 238856), (120, 179142), (144, 149285), (146, 147240), (180, 119428), (219, 98160), (240, 89571), (292, 73620), (360, 59714), (365, 58896), (409, 52560), (438, 49080), (584, 36810), (657, 32720), (720, 29857), (730, 29448), (818, 26280), (876, 24540), (1095, 19632), (1168, 18405), (1227, 17520), (1314, 16360), (1460, 14724), (1636, 13140), (1752, 12270), (2045, 10512), (2190, 9816), (2454, 8760), (2628, 8180), (2920, 7362), (3272, 6570), (3285, 6544), (3504, 6135), (3681, 5840), (4090, 5256), (4380, 4908)]