21130473

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1$

素因数の和:226

約数の個数: 64

約数和(自身を含む): 38223360

約数和(自身を除く): 17092887

約数列:

[1, 3, 7, 13, 17, 21, 29, 39, 51, 87, 91, 119, 157, 203, 221, 273, 357, 377, 471, 493, 609, 663, 1099, 1131, 1479, 1547, 2041, 2639, 2669, 3297, 3451, 4553, 4641, 6123, 6409, 7917, 8007, 10353, 13659, 14287, 18683, 19227, 31871, 34697, 42861, 44863, 56049, 59189, 77401, 95613, 104091, 134589, 177567, 232203, 242879, 414323, 541807, 728637, 1006213, 1242969, 1625421, 3018639, 7043491, 21130473]

約数ペア:

[(1, 21130473), (3, 7043491), (7, 3018639), (13, 1625421), (17, 1242969), (21, 1006213), (29, 728637), (39, 541807), (51, 414323), (87, 242879), (91, 232203), (119, 177567), (157, 134589), (203, 104091), (221, 95613), (273, 77401), (357, 59189), (377, 56049), (471, 44863), (493, 42861), (609, 34697), (663, 31871), (1099, 19227), (1131, 18683), (1479, 14287), (1547, 13659), (2041, 10353), (2639, 8007), (2669, 7917), (3297, 6409), (3451, 6123), (4553, 4641)]