21089556

素因数分解:

$2^2\times 3^2\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:341

約数の個数: 72

約数和(自身を含む): 55770624

約数和(自身を除く): 34681068

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 37, 71, 74, 111, 142, 148, 213, 222, 223, 284, 333, 426, 444, 446, 639, 666, 669, 852, 892, 1278, 1332, 1338, 2007, 2556, 2627, 2676, 4014, 5254, 7881, 8028, 8251, 10508, 15762, 15833, 16502, 23643, 24753, 31524, 31666, 33004, 47286, 47499, 49506, 63332, 74259, 94572, 94998, 99012, 142497, 148518, 189996, 284994, 297036, 569988, 585821, 1171642, 1757463, 2343284, 3514926, 5272389, 7029852, 10544778, 21089556]

約数ペア:

[(1, 21089556), (2, 10544778), (3, 7029852), (4, 5272389), (6, 3514926), (9, 2343284), (12, 1757463), (18, 1171642), (36, 585821), (37, 569988), (71, 297036), (74, 284994), (111, 189996), (142, 148518), (148, 142497), (213, 99012), (222, 94998), (223, 94572), (284, 74259), (333, 63332), (426, 49506), (444, 47499), (446, 47286), (639, 33004), (666, 31666), (669, 31524), (852, 24753), (892, 23643), (1278, 16502), (1332, 15833), (1338, 15762), (2007, 10508), (2556, 8251), (2627, 8028), (2676, 7881), (4014, 5254)]