21040790740

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^2\times {\mathrm{431}}^1\times {\mathrm{1783}}^1$

素因数の和:2297

約数の個数: 72

約数和(自身を含む): 45543036672

約数和(自身を除く): 24502245932

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 431, 740, 862, 1369, 1724, 1783, 2155, 2738, 3566, 4310, 5476, 6845, 7132, 8620, 8915, 13690, 15947, 17830, 27380, 31894, 35660, 63788, 65971, 79735, 131942, 159470, 263884, 318940, 329855, 590039, 659710, 768473, 1180078, 1319420, 1536946, 2360156, 2440927, 2950195, 3073892, 3842365, 4881854, 5900390, 7684730, 9763708, 11800780, 12204635, 15369460, 24409270, 28433501, 48818540, 56867002, 113734004, 142167505, 284335010, 568670020, 1052039537, 2104079074, 4208158148, 5260197685, 10520395370, 21040790740]

約数ペア:

[(1, 21040790740), (2, 10520395370), (4, 5260197685), (5, 4208158148), (10, 2104079074), (20, 1052039537), (37, 568670020), (74, 284335010), (148, 142167505), (185, 113734004), (370, 56867002), (431, 48818540), (740, 28433501), (862, 24409270), (1369, 15369460), (1724, 12204635), (1783, 11800780), (2155, 9763708), (2738, 7684730), (3566, 5900390), (4310, 4881854), (5476, 3842365), (6845, 3073892), (7132, 2950195), (8620, 2440927), (8915, 2360156), (13690, 1536946), (15947, 1319420), (17830, 1180078), (27380, 768473), (31894, 659710), (35660, 590039), (63788, 329855), (65971, 318940), (79735, 263884), (131942, 159470)]