21271972.000000000

素因数分解:

$2^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{4021}}^1$

素因数の和:4081

約数の個数: 64

約数和(自身を含む): 258453720

約数和(自身を除く): 152942680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 320, 328, 410, 640, 656, 820, 1312, 1640, 2624, 3280, 4021, 5248, 6560, 8042, 13120, 16084, 20105, 26240, 32168, 40210, 64336, 80420, 128672, 160840, 164861, 257344, 321680, 329722, 514688, 643360, 659444, 824305, 1286720, 1318888, 1648610, 2573440, 2637776, 3297220, 5275552, 6594440, 10551104, 13188880, 21102208, 26377760, 52755520, 105511040]

約数ペア:

[(1, 105511040), (2, 52755520), (4, 26377760), (5, 21102208), (8, 13188880), (10, 10551104), (16, 6594440), (20, 5275552), (32, 3297220), (40, 2637776), (41, 2573440), (64, 1648610), (80, 1318888), (82, 1286720), (128, 824305), (160, 659444), (164, 643360), (205, 514688), (320, 329722), (328, 321680), (410, 257344), (640, 164861), (656, 160840), (820, 128672), (1312, 80420), (1640, 64336), (2624, 40210), (3280, 32168), (4021, 26240), (5248, 20105), (6560, 16084), (8042, 13120)]