217267778

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{397}}^1$

素因数の和:547

約数の個数: 64

約数和(自身を含む): 419371008

約数和(自身を除く): 202103230

約数列:

[1, 2, 7, 13, 14, 26, 31, 62, 91, 97, 182, 194, 217, 397, 403, 434, 679, 794, 806, 1261, 1358, 2522, 2779, 2821, 3007, 5161, 5558, 5642, 6014, 8827, 10322, 12307, 17654, 21049, 24614, 36127, 38509, 39091, 42098, 72254, 77018, 78182, 86149, 159991, 172298, 269563, 273637, 319982, 500617, 539126, 547274, 1001234, 1119937, 1193779, 2239874, 2387558, 3504319, 7008638, 8356453, 15519127, 16712906, 31038254, 108633889, 217267778]

約数ペア:

[(1, 217267778), (2, 108633889), (7, 31038254), (13, 16712906), (14, 15519127), (26, 8356453), (31, 7008638), (62, 3504319), (91, 2387558), (97, 2239874), (182, 1193779), (194, 1119937), (217, 1001234), (397, 547274), (403, 539126), (434, 500617), (679, 319982), (794, 273637), (806, 269563), (1261, 172298), (1358, 159991), (2522, 86149), (2779, 78182), (2821, 77018), (3007, 72254), (5161, 42098), (5558, 39091), (5642, 38509), (6014, 36127), (8827, 24614), (10322, 21049), (12307, 17654)]