19906810

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{251}}^1$

素因数の和:379

約数の個数: 64

約数和(自身を含む): 45287424

約数和(自身を除く): 25380614

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 103, 110, 154, 206, 251, 385, 502, 515, 721, 770, 1030, 1133, 1255, 1442, 1757, 2266, 2510, 2761, 3514, 3605, 5522, 5665, 7210, 7931, 8785, 11330, 13805, 15862, 17570, 19327, 25853, 27610, 38654, 39655, 51706, 79310, 96635, 129265, 180971, 193270, 258530, 284383, 361942, 568766, 904855, 1421915, 1809710, 1990681, 2843830, 3981362, 9953405, 19906810]

約数ペア:

[(1, 19906810), (2, 9953405), (5, 3981362), (7, 2843830), (10, 1990681), (11, 1809710), (14, 1421915), (22, 904855), (35, 568766), (55, 361942), (70, 284383), (77, 258530), (103, 193270), (110, 180971), (154, 129265), (206, 96635), (251, 79310), (385, 51706), (502, 39655), (515, 38654), (721, 27610), (770, 25853), (1030, 19327), (1133, 17570), (1255, 15862), (1442, 13805), (1757, 11330), (2266, 8785), (2510, 7931), (2761, 7210), (3514, 5665), (3605, 5522)]