18784220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{10321}}^1$

素因数の和:10350

約数の個数: 48

約数和(自身を含む): 48554688

約数和(自身を除く): 29770468

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 10321, 20642, 41284, 51605, 72247, 103210, 134173, 144494, 206420, 268346, 288988, 361235, 536692, 670865, 722470, 939211, 1341730, 1444940, 1878422, 2683460, 3756844, 4696055, 9392110, 18784220]

約数ペア:

[(1, 18784220), (2, 9392110), (4, 4696055), (5, 3756844), (7, 2683460), (10, 1878422), (13, 1444940), (14, 1341730), (20, 939211), (26, 722470), (28, 670865), (35, 536692), (52, 361235), (65, 288988), (70, 268346), (91, 206420), (130, 144494), (140, 134173), (182, 103210), (260, 72247), (364, 51605), (455, 41284), (910, 20642), (1820, 10321)]