21672280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1$

素因数の和:221

約数の個数: 128

約数和(自身を含む): 61430400

約数和(自身を除く): 39758120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 29, 34, 35, 40, 56, 58, 68, 70, 85, 116, 119, 136, 140, 145, 157, 170, 203, 232, 238, 280, 290, 314, 340, 406, 476, 493, 580, 595, 628, 680, 785, 812, 952, 986, 1015, 1099, 1160, 1190, 1256, 1570, 1624, 1972, 2030, 2198, 2380, 2465, 2669, 3140, 3451, 3944, 4060, 4396, 4553, 4760, 4930, 5338, 5495, 6280, 6902, 8120, 8792, 9106, 9860, 10676, 10990, 13345, 13804, 17255, 18212, 18683, 19720, 21352, 21980, 22765, 26690, 27608, 31871, 34510, 36424, 37366, 43960, 45530, 53380, 63742, 69020, 74732, 77401, 91060, 93415, 106760, 127484, 138040, 149464, 154802, 159355, 182120, 186830, 254968, 309604, 318710, 373660, 387005, 541807, 619208, 637420, 747320, 774010, 1083614, 1274840, 1548020, 2167228, 2709035, 3096040, 4334456, 5418070, 10836140, 21672280]

約数ペア:

[(1, 21672280), (2, 10836140), (4, 5418070), (5, 4334456), (7, 3096040), (8, 2709035), (10, 2167228), (14, 1548020), (17, 1274840), (20, 1083614), (28, 774010), (29, 747320), (34, 637420), (35, 619208), (40, 541807), (56, 387005), (58, 373660), (68, 318710), (70, 309604), (85, 254968), (116, 186830), (119, 182120), (136, 159355), (140, 154802), (145, 149464), (157, 138040), (170, 127484), (203, 106760), (232, 93415), (238, 91060), (280, 77401), (290, 74732), (314, 69020), (340, 63742), (406, 53380), (476, 45530), (493, 43960), (580, 37366), (595, 36424), (628, 34510), (680, 31871), (785, 27608), (812, 26690), (952, 22765), (986, 21980), (1015, 21352), (1099, 19720), (1160, 18683), (1190, 18212), (1256, 17255), (1570, 13804), (1624, 13345), (1972, 10990), (2030, 10676), (2198, 9860), (2380, 9106), (2465, 8792), (2669, 8120), (3140, 6902), (3451, 6280), (3944, 5495), (4060, 5338), (4396, 4930), (4553, 4760)]