20387913

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:254

約数の個数: 64

約数和(自身を含む): 37158912

約数和(自身を除く): 16770999

約数列:

[1, 3, 7, 13, 17, 21, 23, 39, 51, 69, 91, 119, 161, 191, 221, 273, 299, 357, 391, 483, 573, 663, 897, 1173, 1337, 1547, 2093, 2483, 2737, 3247, 4011, 4393, 4641, 5083, 6279, 7449, 8211, 9741, 13179, 15249, 17381, 22729, 30751, 35581, 42211, 52143, 57109, 68187, 74681, 92253, 106743, 126633, 171327, 224043, 295477, 399763, 522767, 886431, 970853, 1199289, 1568301, 2912559, 6795971, 20387913]

約数ペア:

[(1, 20387913), (3, 6795971), (7, 2912559), (13, 1568301), (17, 1199289), (21, 970853), (23, 886431), (39, 522767), (51, 399763), (69, 295477), (91, 224043), (119, 171327), (161, 126633), (191, 106743), (221, 92253), (273, 74681), (299, 68187), (357, 57109), (391, 52143), (483, 42211), (573, 35581), (663, 30751), (897, 22729), (1173, 17381), (1337, 15249), (1547, 13179), (2093, 9741), (2483, 8211), (2737, 7449), (3247, 6279), (4011, 5083), (4393, 4641)]