21605694

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1$

素因数の和:413

約数の個数: 64

約数和(自身を含む): 50485248

約数和(自身を除く): 28879554

約数列:

[1, 2, 3, 6, 11, 22, 23, 33, 43, 46, 66, 69, 86, 129, 138, 253, 258, 331, 473, 506, 662, 759, 946, 989, 993, 1419, 1518, 1978, 1986, 2838, 2967, 3641, 5934, 7282, 7613, 10879, 10923, 14233, 15226, 21758, 21846, 22839, 28466, 32637, 42699, 45678, 65274, 83743, 85398, 156563, 167486, 251229, 313126, 327359, 469689, 502458, 654718, 939378, 982077, 1964154, 3600949, 7201898, 10802847, 21605694]

約数ペア:

[(1, 21605694), (2, 10802847), (3, 7201898), (6, 3600949), (11, 1964154), (22, 982077), (23, 939378), (33, 654718), (43, 502458), (46, 469689), (66, 327359), (69, 313126), (86, 251229), (129, 167486), (138, 156563), (253, 85398), (258, 83743), (331, 65274), (473, 45678), (506, 42699), (662, 32637), (759, 28466), (946, 22839), (989, 21846), (993, 21758), (1419, 15226), (1518, 14233), (1978, 10923), (1986, 10879), (2838, 7613), (2967, 7282), (3641, 5934)]