20781648368

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{42899}}^1$

素因数の和:43074

約数の個数: 80

約数和(自身を含む): 46248602400

約数和(自身を除く): 25466954032

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 52, 68, 104, 136, 137, 208, 221, 272, 274, 442, 548, 884, 1096, 1768, 1781, 2192, 2329, 3536, 3562, 4658, 7124, 9316, 14248, 18632, 28496, 30277, 37264, 42899, 60554, 85798, 121108, 171596, 242216, 343192, 484432, 557687, 686384, 729283, 1115374, 1458566, 2230748, 2917132, 4461496, 5834264, 5877163, 8922992, 9480679, 11668528, 11754326, 18961358, 23508652, 37922716, 47017304, 75845432, 76403119, 94034608, 99911771, 151690864, 152806238, 199823542, 305612476, 399647084, 611224952, 799294168, 1222449904, 1298853023, 1598588336, 2597706046, 5195412092, 10390824184, 20781648368]

約数ペア:

[(1, 20781648368), (2, 10390824184), (4, 5195412092), (8, 2597706046), (13, 1598588336), (16, 1298853023), (17, 1222449904), (26, 799294168), (34, 611224952), (52, 399647084), (68, 305612476), (104, 199823542), (136, 152806238), (137, 151690864), (208, 99911771), (221, 94034608), (272, 76403119), (274, 75845432), (442, 47017304), (548, 37922716), (884, 23508652), (1096, 18961358), (1768, 11754326), (1781, 11668528), (2192, 9480679), (2329, 8922992), (3536, 5877163), (3562, 5834264), (4658, 4461496), (7124, 2917132), (9316, 2230748), (14248, 1458566), (18632, 1115374), (28496, 729283), (30277, 686384), (37264, 557687), (42899, 484432), (60554, 343192), (85798, 242216), (121108, 171596)]