20915510

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1181}}^1$

素因数の和:1229

約数の個数: 64

約数和(自身を含む): 49019904

約数和(自身を除く): 28104394

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 23, 35, 46, 55, 70, 77, 110, 115, 154, 161, 230, 253, 322, 385, 506, 770, 805, 1181, 1265, 1610, 1771, 2362, 2530, 3542, 5905, 8267, 8855, 11810, 12991, 16534, 17710, 25982, 27163, 41335, 54326, 64955, 82670, 90937, 129910, 135815, 181874, 190141, 271630, 298793, 380282, 454685, 597586, 909370, 950705, 1493965, 1901410, 2091551, 2987930, 4183102, 10457755, 20915510]

約数ペア:

[(1, 20915510), (2, 10457755), (5, 4183102), (7, 2987930), (10, 2091551), (11, 1901410), (14, 1493965), (22, 950705), (23, 909370), (35, 597586), (46, 454685), (55, 380282), (70, 298793), (77, 271630), (110, 190141), (115, 181874), (154, 135815), (161, 129910), (230, 90937), (253, 82670), (322, 64955), (385, 54326), (506, 41335), (770, 27163), (805, 25982), (1181, 17710), (1265, 16534), (1610, 12991), (1771, 11810), (2362, 8855), (2530, 8267), (3542, 5905)]