20803750

素因数分解:

$2^1\times 5^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1$

素因数の和:139

約数の個数: 80

約数和(自身を含む): 45547920

約数和(自身を除く): 24744170

約数列:

[1, 2, 5, 10, 11, 17, 22, 25, 34, 50, 55, 85, 89, 110, 125, 170, 178, 187, 250, 275, 374, 425, 445, 550, 625, 850, 890, 935, 979, 1250, 1375, 1513, 1870, 1958, 2125, 2225, 2750, 3026, 4250, 4450, 4675, 4895, 6875, 7565, 9350, 9790, 10625, 11125, 13750, 15130, 16643, 21250, 22250, 23375, 24475, 33286, 37825, 46750, 48950, 55625, 75650, 83215, 111250, 116875, 122375, 166430, 189125, 233750, 244750, 378250, 416075, 611875, 832150, 945625, 1223750, 1891250, 2080375, 4160750, 10401875, 20803750]

約数ペア:

[(1, 20803750), (2, 10401875), (5, 4160750), (10, 2080375), (11, 1891250), (17, 1223750), (22, 945625), (25, 832150), (34, 611875), (50, 416075), (55, 378250), (85, 244750), (89, 233750), (110, 189125), (125, 166430), (170, 122375), (178, 116875), (187, 111250), (250, 83215), (275, 75650), (374, 55625), (425, 48950), (445, 46750), (550, 37825), (625, 33286), (850, 24475), (890, 23375), (935, 22250), (979, 21250), (1250, 16643), (1375, 15130), (1513, 13750), (1870, 11125), (1958, 10625), (2125, 9790), (2225, 9350), (2750, 7565), (3026, 6875), (4250, 4895), (4450, 4675)]