21781392

素因数分解:

$2^4\times 3^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:288

約数の個数: 80

約数和(自身を含む): 58859328

約数和(自身を除く): 37077936

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 43, 48, 61, 86, 122, 129, 172, 173, 183, 244, 258, 344, 346, 366, 488, 516, 519, 688, 692, 732, 976, 1032, 1038, 1384, 1464, 2064, 2076, 2623, 2768, 2928, 4152, 5246, 7439, 7869, 8304, 10492, 10553, 14878, 15738, 20984, 21106, 22317, 29756, 31476, 31659, 41968, 42212, 44634, 59512, 62952, 63318, 84424, 89268, 119024, 125904, 126636, 168848, 178536, 253272, 357072, 453779, 506544, 907558, 1361337, 1815116, 2722674, 3630232, 5445348, 7260464, 10890696, 21781392]

約数ペア:

[(1, 21781392), (2, 10890696), (3, 7260464), (4, 5445348), (6, 3630232), (8, 2722674), (12, 1815116), (16, 1361337), (24, 907558), (43, 506544), (48, 453779), (61, 357072), (86, 253272), (122, 178536), (129, 168848), (172, 126636), (173, 125904), (183, 119024), (244, 89268), (258, 84424), (344, 63318), (346, 62952), (366, 59512), (488, 44634), (516, 42212), (519, 41968), (688, 31659), (692, 31476), (732, 29756), (976, 22317), (1032, 21106), (1038, 20984), (1384, 15738), (1464, 14878), (2064, 10553), (2076, 10492), (2623, 8304), (2768, 7869), (2928, 7439), (4152, 5246)]