21971895

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:176

約数の個数: 64

約数和(自身を含む): 40711680

約数和(自身を除く): 18739785

約数列:

[1, 3, 5, 11, 15, 33, 37, 55, 59, 61, 111, 165, 177, 183, 185, 295, 305, 407, 555, 649, 671, 885, 915, 1221, 1947, 2013, 2035, 2183, 2257, 3245, 3355, 3599, 6105, 6549, 6771, 9735, 10065, 10797, 10915, 11285, 17995, 24013, 24827, 32745, 33855, 39589, 53985, 72039, 74481, 118767, 120065, 124135, 133163, 197945, 360195, 372405, 399489, 593835, 665815, 1464793, 1997445, 4394379, 7323965, 21971895]

約数ペア:

[(1, 21971895), (3, 7323965), (5, 4394379), (11, 1997445), (15, 1464793), (33, 665815), (37, 593835), (55, 399489), (59, 372405), (61, 360195), (111, 197945), (165, 133163), (177, 124135), (183, 120065), (185, 118767), (295, 74481), (305, 72039), (407, 53985), (555, 39589), (649, 33855), (671, 32745), (885, 24827), (915, 24013), (1221, 17995), (1947, 11285), (2013, 10915), (2035, 10797), (2183, 10065), (2257, 9735), (3245, 6771), (3355, 6549), (3599, 6105)]