19718540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{173}}^1$

素因数の和:362

約数の個数: 48

約数和(自身を含む): 42971040

約数和(自身を除く): 23252500

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 139, 164, 173, 205, 278, 346, 410, 556, 692, 695, 820, 865, 1390, 1730, 2780, 3460, 5699, 7093, 11398, 14186, 22796, 24047, 28372, 28495, 35465, 48094, 56990, 70930, 96188, 113980, 120235, 141860, 240470, 480940, 985927, 1971854, 3943708, 4929635, 9859270, 19718540]

約数ペア:

[(1, 19718540), (2, 9859270), (4, 4929635), (5, 3943708), (10, 1971854), (20, 985927), (41, 480940), (82, 240470), (139, 141860), (164, 120235), (173, 113980), (205, 96188), (278, 70930), (346, 56990), (410, 48094), (556, 35465), (692, 28495), (695, 28372), (820, 24047), (865, 22796), (1390, 14186), (1730, 11398), (2780, 7093), (3460, 5699)]