21490160

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1$

素因数の和:258

約数の個数: 80

約数和(自身を含む): 52898400

約数和(自身を除く): 31408240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 59, 80, 116, 118, 145, 157, 232, 236, 290, 295, 314, 464, 472, 580, 590, 628, 785, 944, 1160, 1180, 1256, 1570, 1711, 2320, 2360, 2512, 3140, 3422, 4553, 4720, 6280, 6844, 8555, 9106, 9263, 12560, 13688, 17110, 18212, 18526, 22765, 27376, 34220, 36424, 37052, 45530, 46315, 68440, 72848, 74104, 91060, 92630, 136880, 148208, 182120, 185260, 268627, 364240, 370520, 537254, 741040, 1074508, 1343135, 2149016, 2686270, 4298032, 5372540, 10745080, 21490160]

約数ペア:

[(1, 21490160), (2, 10745080), (4, 5372540), (5, 4298032), (8, 2686270), (10, 2149016), (16, 1343135), (20, 1074508), (29, 741040), (40, 537254), (58, 370520), (59, 364240), (80, 268627), (116, 185260), (118, 182120), (145, 148208), (157, 136880), (232, 92630), (236, 91060), (290, 74104), (295, 72848), (314, 68440), (464, 46315), (472, 45530), (580, 37052), (590, 36424), (628, 34220), (785, 27376), (944, 22765), (1160, 18526), (1180, 18212), (1256, 17110), (1570, 13688), (1711, 12560), (2320, 9263), (2360, 9106), (2512, 8555), (3140, 6844), (3422, 6280), (4553, 4720)]