21986999984

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{318911}}^1$

素因数の和:319089

約数の個数: 40

約数和(自身を含む): 44290498560

約数和(自身を除く): 22303498576

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 139, 248, 278, 496, 556, 1112, 2224, 4309, 8618, 17236, 34472, 68944, 318911, 637822, 1275644, 2551288, 5102576, 9886241, 19772482, 39544964, 44328629, 79089928, 88657258, 158179856, 177314516, 354629032, 709258064, 1374187499, 2748374998, 5496749996, 10993499992, 21986999984]

約数ペア:

[(1, 21986999984), (2, 10993499992), (4, 5496749996), (8, 2748374998), (16, 1374187499), (31, 709258064), (62, 354629032), (124, 177314516), (139, 158179856), (248, 88657258), (278, 79089928), (496, 44328629), (556, 39544964), (1112, 19772482), (2224, 9886241), (4309, 5102576), (8618, 2551288), (17236, 1275644), (34472, 637822), (68944, 318911)]