27861980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{227}}^1$

素因数の和:291

約数の個数: 72

約数和(自身を含む): 65672208

約数和(自身を除く): 37810228

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 68, 76, 85, 95, 170, 190, 227, 323, 340, 361, 380, 454, 646, 722, 908, 1135, 1292, 1444, 1615, 1805, 2270, 3230, 3610, 3859, 4313, 4540, 6137, 6460, 7220, 7718, 8626, 12274, 15436, 17252, 19295, 21565, 24548, 30685, 38590, 43130, 61370, 73321, 77180, 81947, 86260, 122740, 146642, 163894, 293284, 327788, 366605, 409735, 733210, 819470, 1393099, 1466420, 1638940, 2786198, 5572396, 6965495, 13930990, 27861980]

約数ペア:

[(1, 27861980), (2, 13930990), (4, 6965495), (5, 5572396), (10, 2786198), (17, 1638940), (19, 1466420), (20, 1393099), (34, 819470), (38, 733210), (68, 409735), (76, 366605), (85, 327788), (95, 293284), (170, 163894), (190, 146642), (227, 122740), (323, 86260), (340, 81947), (361, 77180), (380, 73321), (454, 61370), (646, 43130), (722, 38590), (908, 30685), (1135, 24548), (1292, 21565), (1444, 19295), (1615, 17252), (1805, 15436), (2270, 12274), (3230, 8626), (3610, 7718), (3859, 7220), (4313, 6460), (4540, 6137)]