20027020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1$

素因数の和:259

約数の個数: 96

約数和(自身を含む): 50295168

約数和(自身を除く): 30268148

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 23, 26, 34, 46, 52, 65, 68, 85, 92, 115, 130, 170, 197, 221, 230, 260, 299, 340, 391, 394, 442, 460, 598, 782, 788, 884, 985, 1105, 1196, 1495, 1564, 1955, 1970, 2210, 2561, 2990, 3349, 3910, 3940, 4420, 4531, 5083, 5122, 5980, 6698, 7820, 9062, 10166, 10244, 12805, 13396, 16745, 18124, 20332, 22655, 25415, 25610, 33490, 43537, 45310, 50830, 51220, 58903, 66980, 77027, 87074, 90620, 101660, 117806, 154054, 174148, 217685, 235612, 294515, 308108, 385135, 435370, 589030, 770270, 870740, 1001351, 1178060, 1540540, 2002702, 4005404, 5006755, 10013510, 20027020]

約数ペア:

[(1, 20027020), (2, 10013510), (4, 5006755), (5, 4005404), (10, 2002702), (13, 1540540), (17, 1178060), (20, 1001351), (23, 870740), (26, 770270), (34, 589030), (46, 435370), (52, 385135), (65, 308108), (68, 294515), (85, 235612), (92, 217685), (115, 174148), (130, 154054), (170, 117806), (197, 101660), (221, 90620), (230, 87074), (260, 77027), (299, 66980), (340, 58903), (391, 51220), (394, 50830), (442, 45310), (460, 43537), (598, 33490), (782, 25610), (788, 25415), (884, 22655), (985, 20332), (1105, 18124), (1196, 16745), (1495, 13396), (1564, 12805), (1955, 10244), (1970, 10166), (2210, 9062), (2561, 7820), (2990, 6698), (3349, 5980), (3910, 5122), (3940, 5083), (4420, 4531)]