19858916

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1$

素因数の和:241

約数の個数: 72

約数和(自身を含む): 45122112

約数和(自身を除く): 25263196

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 61, 77, 98, 122, 151, 154, 196, 244, 302, 308, 427, 539, 604, 671, 854, 1057, 1078, 1342, 1661, 1708, 2114, 2156, 2684, 2989, 3322, 4228, 4697, 5978, 6644, 7399, 9211, 9394, 11627, 11956, 14798, 18422, 18788, 23254, 29596, 32879, 36844, 46508, 64477, 65758, 81389, 101321, 128954, 131516, 162778, 202642, 257908, 325556, 405284, 451339, 709247, 902678, 1418494, 1805356, 2836988, 4964729, 9929458, 19858916]

約数ペア:

[(1, 19858916), (2, 9929458), (4, 4964729), (7, 2836988), (11, 1805356), (14, 1418494), (22, 902678), (28, 709247), (44, 451339), (49, 405284), (61, 325556), (77, 257908), (98, 202642), (122, 162778), (151, 131516), (154, 128954), (196, 101321), (244, 81389), (302, 65758), (308, 64477), (427, 46508), (539, 36844), (604, 32879), (671, 29596), (854, 23254), (1057, 18788), (1078, 18422), (1342, 14798), (1661, 11956), (1708, 11627), (2114, 9394), (2156, 9211), (2684, 7399), (2989, 6644), (3322, 5978), (4228, 4697)]