641408840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{4241}}^1$

素因数の和:4470

約数の個数: 64

約数和(自身を含む): 1527120000

約数和(自身を除く): 885711160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 199, 380, 398, 760, 796, 995, 1592, 1990, 3781, 3980, 4241, 7562, 7960, 8482, 15124, 16964, 18905, 21205, 30248, 33928, 37810, 42410, 75620, 80579, 84820, 151240, 161158, 169640, 322316, 402895, 644632, 805790, 843959, 1611580, 1687918, 3223160, 3375836, 4219795, 6751672, 8439590, 16035221, 16879180, 32070442, 33758360, 64140884, 80176105, 128281768, 160352210, 320704420, 641408840]

約数ペア:

[(1, 641408840), (2, 320704420), (4, 160352210), (5, 128281768), (8, 80176105), (10, 64140884), (19, 33758360), (20, 32070442), (38, 16879180), (40, 16035221), (76, 8439590), (95, 6751672), (152, 4219795), (190, 3375836), (199, 3223160), (380, 1687918), (398, 1611580), (760, 843959), (796, 805790), (995, 644632), (1592, 402895), (1990, 322316), (3781, 169640), (3980, 161158), (4241, 151240), (7562, 84820), (7960, 80579), (8482, 75620), (15124, 42410), (16964, 37810), (18905, 33928), (21205, 30248)]