21591020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{251}}^1$

素因数の和:311

約数の個数: 96

約数和(自身を含む): 54867456

約数和(自身を除く): 33276436

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 23, 34, 44, 46, 55, 68, 85, 92, 110, 115, 170, 187, 220, 230, 251, 253, 340, 374, 391, 460, 502, 506, 748, 782, 935, 1004, 1012, 1255, 1265, 1564, 1870, 1955, 2510, 2530, 2761, 3740, 3910, 4267, 4301, 5020, 5060, 5522, 5773, 7820, 8534, 8602, 11044, 11546, 13805, 17068, 17204, 21335, 21505, 23092, 27610, 28865, 42670, 43010, 46937, 55220, 57730, 63503, 85340, 86020, 93874, 98141, 115460, 127006, 187748, 196282, 234685, 254012, 317515, 392564, 469370, 490705, 635030, 938740, 981410, 1079551, 1270060, 1962820, 2159102, 4318204, 5397755, 10795510, 21591020]

約数ペア:

[(1, 21591020), (2, 10795510), (4, 5397755), (5, 4318204), (10, 2159102), (11, 1962820), (17, 1270060), (20, 1079551), (22, 981410), (23, 938740), (34, 635030), (44, 490705), (46, 469370), (55, 392564), (68, 317515), (85, 254012), (92, 234685), (110, 196282), (115, 187748), (170, 127006), (187, 115460), (220, 98141), (230, 93874), (251, 86020), (253, 85340), (340, 63503), (374, 57730), (391, 55220), (460, 46937), (502, 43010), (506, 42670), (748, 28865), (782, 27610), (935, 23092), (1004, 21505), (1012, 21335), (1255, 17204), (1265, 17068), (1564, 13805), (1870, 11546), (1955, 11044), (2510, 8602), (2530, 8534), (2761, 7820), (3740, 5773), (3910, 5522), (4267, 5060), (4301, 5020)]