18901701

素因数分解:

$3^3\times 7^3\times {\mathrm{13}}^1\times {\mathrm{157}}^1$

素因数の和:200

約数の個数: 64

約数和(自身を含む): 35392000

約数和(自身を除く): 16490299

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 91, 117, 147, 157, 189, 273, 343, 351, 441, 471, 637, 819, 1029, 1099, 1323, 1413, 1911, 2041, 2457, 3087, 3297, 4239, 4459, 5733, 6123, 7693, 9261, 9891, 13377, 14287, 17199, 18369, 23079, 29673, 40131, 42861, 53851, 55107, 69237, 100009, 120393, 128583, 161553, 207711, 300027, 385749, 484659, 700063, 900081, 1453977, 2100189, 2700243, 6300567, 18901701]

約数ペア:

[(1, 18901701), (3, 6300567), (7, 2700243), (9, 2100189), (13, 1453977), (21, 900081), (27, 700063), (39, 484659), (49, 385749), (63, 300027), (91, 207711), (117, 161553), (147, 128583), (157, 120393), (189, 100009), (273, 69237), (343, 55107), (351, 53851), (441, 42861), (471, 40131), (637, 29673), (819, 23079), (1029, 18369), (1099, 17199), (1323, 14287), (1413, 13377), (1911, 9891), (2041, 9261), (2457, 7693), (3087, 6123), (3297, 5733), (4239, 4459)]