20018901

素因数分解:

$3^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 33619968

約数和(自身を除く): 13601067

約数列:

[1, 3, 7, 21, 23, 31, 49, 69, 93, 147, 161, 191, 217, 483, 573, 651, 713, 1127, 1337, 1519, 2139, 3381, 4011, 4393, 4557, 4991, 5921, 9359, 13179, 14973, 17763, 28077, 30751, 34937, 41447, 92253, 104811, 124341, 136183, 215257, 290129, 408549, 645771, 870387, 953281, 2859843, 6672967, 20018901]

約数ペア:

[(1, 20018901), (3, 6672967), (7, 2859843), (21, 953281), (23, 870387), (31, 645771), (49, 408549), (69, 290129), (93, 215257), (147, 136183), (161, 124341), (191, 104811), (217, 92253), (483, 41447), (573, 34937), (651, 30751), (713, 28077), (1127, 17763), (1337, 14973), (1519, 13179), (2139, 9359), (3381, 5921), (4011, 4991), (4393, 4557)]