21869415

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 39926016

約数和(自身を除く): 18056601

約数列:

[1, 3, 5, 9, 15, 31, 45, 61, 93, 155, 183, 257, 279, 305, 465, 549, 771, 915, 1285, 1395, 1891, 2313, 2745, 3855, 5673, 7967, 9455, 11565, 15677, 17019, 23901, 28365, 39835, 47031, 71703, 78385, 85095, 119505, 141093, 235155, 358515, 485987, 705465, 1457961, 2429935, 4373883, 7289805, 21869415]

約数ペア:

[(1, 21869415), (3, 7289805), (5, 4373883), (9, 2429935), (15, 1457961), (31, 705465), (45, 485987), (61, 358515), (93, 235155), (155, 141093), (183, 119505), (257, 85095), (279, 78385), (305, 71703), (465, 47031), (549, 39835), (771, 28365), (915, 23901), (1285, 17019), (1395, 15677), (1891, 11565), (2313, 9455), (2745, 7967), (3855, 5673)]