19662740

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 42747264

約数和(自身を除く): 23084524

約数列:

[1, 2, 4, 5, 10, 20, 61, 71, 122, 142, 227, 244, 284, 305, 355, 454, 610, 710, 908, 1135, 1220, 1420, 2270, 4331, 4540, 8662, 13847, 16117, 17324, 21655, 27694, 32234, 43310, 55388, 64468, 69235, 80585, 86620, 138470, 161170, 276940, 322340, 983137, 1966274, 3932548, 4915685, 9831370, 19662740]

約数ペア:

[(1, 19662740), (2, 9831370), (4, 4915685), (5, 3932548), (10, 1966274), (20, 983137), (61, 322340), (71, 276940), (122, 161170), (142, 138470), (227, 86620), (244, 80585), (284, 69235), (305, 64468), (355, 55388), (454, 43310), (610, 32234), (710, 27694), (908, 21655), (1135, 17324), (1220, 16117), (1420, 13847), (2270, 8662), (4331, 4540)]