20418160

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{101}}^1$

素因数の和:159

約数の個数: 120

約数和(自身を含む): 57826656

約数和(自身を除く): 37408496

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 101, 112, 133, 140, 152, 190, 202, 266, 280, 304, 361, 380, 404, 505, 532, 560, 665, 707, 722, 760, 808, 1010, 1064, 1330, 1414, 1444, 1520, 1616, 1805, 1919, 2020, 2128, 2527, 2660, 2828, 2888, 3535, 3610, 3838, 4040, 5054, 5320, 5656, 5776, 7070, 7220, 7676, 8080, 9595, 10108, 10640, 11312, 12635, 13433, 14140, 14440, 15352, 19190, 20216, 25270, 26866, 28280, 28880, 30704, 36461, 38380, 40432, 50540, 53732, 56560, 67165, 72922, 76760, 101080, 107464, 134330, 145844, 153520, 182305, 202160, 214928, 255227, 268660, 291688, 364610, 510454, 537320, 583376, 729220, 1020908, 1074640, 1276135, 1458440, 2041816, 2552270, 2916880, 4083632, 5104540, 10209080, 20418160]

約数ペア:

[(1, 20418160), (2, 10209080), (4, 5104540), (5, 4083632), (7, 2916880), (8, 2552270), (10, 2041816), (14, 1458440), (16, 1276135), (19, 1074640), (20, 1020908), (28, 729220), (35, 583376), (38, 537320), (40, 510454), (56, 364610), (70, 291688), (76, 268660), (80, 255227), (95, 214928), (101, 202160), (112, 182305), (133, 153520), (140, 145844), (152, 134330), (190, 107464), (202, 101080), (266, 76760), (280, 72922), (304, 67165), (361, 56560), (380, 53732), (404, 50540), (505, 40432), (532, 38380), (560, 36461), (665, 30704), (707, 28880), (722, 28280), (760, 26866), (808, 25270), (1010, 20216), (1064, 19190), (1330, 15352), (1414, 14440), (1444, 14140), (1520, 13433), (1616, 12635), (1805, 11312), (1919, 10640), (2020, 10108), (2128, 9595), (2527, 8080), (2660, 7676), (2828, 7220), (2888, 7070), (3535, 5776), (3610, 5656), (3838, 5320), (4040, 5054)]