28111720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7723}}^1$

素因数の和:7754

約数の個数: 64

約数和(自身を含む): 77857920

約数和(自身を除く): 49746200

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 7723, 15446, 30892, 38615, 54061, 61784, 77230, 100399, 108122, 154460, 200798, 216244, 270305, 308920, 401596, 432488, 501995, 540610, 702793, 803192, 1003990, 1081220, 1405586, 2007980, 2162440, 2811172, 3513965, 4015960, 5622344, 7027930, 14055860, 28111720]

約数ペア:

[(1, 28111720), (2, 14055860), (4, 7027930), (5, 5622344), (7, 4015960), (8, 3513965), (10, 2811172), (13, 2162440), (14, 2007980), (20, 1405586), (26, 1081220), (28, 1003990), (35, 803192), (40, 702793), (52, 540610), (56, 501995), (65, 432488), (70, 401596), (91, 308920), (104, 270305), (130, 216244), (140, 200798), (182, 154460), (260, 108122), (280, 100399), (364, 77230), (455, 61784), (520, 54061), (728, 38615), (910, 30892), (1820, 15446), (3640, 7723)]