81963980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{9923}}^1$

素因数の和:9998

約数の個数: 48

約数和(自身を含む): 200067840

約数和(自身を除く): 118103860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 59, 70, 118, 140, 236, 295, 413, 590, 826, 1180, 1652, 2065, 4130, 8260, 9923, 19846, 39692, 49615, 69461, 99230, 138922, 198460, 277844, 347305, 585457, 694610, 1170914, 1389220, 2341828, 2927285, 4098199, 5854570, 8196398, 11709140, 16392796, 20490995, 40981990, 81963980]

約数ペア:

[(1, 81963980), (2, 40981990), (4, 20490995), (5, 16392796), (7, 11709140), (10, 8196398), (14, 5854570), (20, 4098199), (28, 2927285), (35, 2341828), (59, 1389220), (70, 1170914), (118, 694610), (140, 585457), (236, 347305), (295, 277844), (413, 198460), (590, 138922), (826, 99230), (1180, 69461), (1652, 49615), (2065, 39692), (4130, 19846), (8260, 9923)]