21649880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{167}}^1\times {\mathrm{463}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 56125440

約数和(自身を除く): 34475560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 167, 280, 334, 463, 668, 835, 926, 1169, 1336, 1670, 1852, 2315, 2338, 3241, 3340, 3704, 4630, 4676, 5845, 6482, 6680, 9260, 9352, 11690, 12964, 16205, 18520, 23380, 25928, 32410, 46760, 64820, 77321, 129640, 154642, 309284, 386605, 541247, 618568, 773210, 1082494, 1546420, 2164988, 2706235, 3092840, 4329976, 5412470, 10824940, 21649880]

約数ペア:

[(1, 21649880), (2, 10824940), (4, 5412470), (5, 4329976), (7, 3092840), (8, 2706235), (10, 2164988), (14, 1546420), (20, 1082494), (28, 773210), (35, 618568), (40, 541247), (56, 386605), (70, 309284), (140, 154642), (167, 129640), (280, 77321), (334, 64820), (463, 46760), (668, 32410), (835, 25928), (926, 23380), (1169, 18520), (1336, 16205), (1670, 12964), (1852, 11690), (2315, 9352), (2338, 9260), (3241, 6680), (3340, 6482), (3704, 5845), (4630, 4676)]