19984010

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{269}}^1$

素因数の和:335

約数の個数: 64

約数和(自身を含む): 41990400

約数和(自身を除く): 22006390

約数列:

[1, 2, 5, 10, 17, 19, 23, 34, 38, 46, 85, 95, 115, 170, 190, 230, 269, 323, 391, 437, 538, 646, 782, 874, 1345, 1615, 1955, 2185, 2690, 3230, 3910, 4370, 4573, 5111, 6187, 7429, 9146, 10222, 12374, 14858, 22865, 25555, 30935, 37145, 45730, 51110, 61870, 74290, 86887, 105179, 117553, 173774, 210358, 235106, 434435, 525895, 587765, 868870, 1051790, 1175530, 1998401, 3996802, 9992005, 19984010]

約数ペア:

[(1, 19984010), (2, 9992005), (5, 3996802), (10, 1998401), (17, 1175530), (19, 1051790), (23, 868870), (34, 587765), (38, 525895), (46, 434435), (85, 235106), (95, 210358), (115, 173774), (170, 117553), (190, 105179), (230, 86887), (269, 74290), (323, 61870), (391, 51110), (437, 45730), (538, 37145), (646, 30935), (782, 25555), (874, 22865), (1345, 14858), (1615, 12374), (1955, 10222), (2185, 9146), (2690, 7429), (3230, 6187), (3910, 5111), (4370, 4573)]