21489580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:191

約数の個数: 96

約数和(自身を含む): 54835200

約数和(自身を除く): 33345620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 67, 70, 79, 116, 134, 140, 145, 158, 203, 268, 290, 316, 335, 395, 406, 469, 553, 580, 670, 790, 812, 938, 1015, 1106, 1340, 1580, 1876, 1943, 2030, 2212, 2291, 2345, 2765, 3886, 4060, 4582, 4690, 5293, 5530, 7772, 9164, 9380, 9715, 10586, 11060, 11455, 13601, 16037, 19430, 21172, 22910, 26465, 27202, 32074, 37051, 38860, 45820, 52930, 54404, 64148, 68005, 74102, 80185, 105860, 136010, 148204, 153497, 160370, 185255, 272020, 306994, 320740, 370510, 613988, 741020, 767485, 1074479, 1534970, 2148958, 3069940, 4297916, 5372395, 10744790, 21489580]

約数ペア:

[(1, 21489580), (2, 10744790), (4, 5372395), (5, 4297916), (7, 3069940), (10, 2148958), (14, 1534970), (20, 1074479), (28, 767485), (29, 741020), (35, 613988), (58, 370510), (67, 320740), (70, 306994), (79, 272020), (116, 185255), (134, 160370), (140, 153497), (145, 148204), (158, 136010), (203, 105860), (268, 80185), (290, 74102), (316, 68005), (335, 64148), (395, 54404), (406, 52930), (469, 45820), (553, 38860), (580, 37051), (670, 32074), (790, 27202), (812, 26465), (938, 22910), (1015, 21172), (1106, 19430), (1340, 16037), (1580, 13601), (1876, 11455), (1943, 11060), (2030, 10586), (2212, 9715), (2291, 9380), (2345, 9164), (2765, 7772), (3886, 5530), (4060, 5293), (4582, 4690)]