20838818

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1487}}^1$

素因数の和:1527

約数の個数: 48

約数和(自身を含む): 42747264

約数和(自身を除く): 21908446

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 49, 77, 91, 98, 143, 154, 182, 286, 539, 637, 1001, 1078, 1274, 1487, 2002, 2974, 7007, 10409, 14014, 16357, 19331, 20818, 32714, 38662, 72863, 114499, 135317, 145726, 212641, 228998, 270634, 425282, 801493, 947219, 1488487, 1602986, 1894438, 2976974, 10419409, 20838818]

約数ペア:

[(1, 20838818), (2, 10419409), (7, 2976974), (11, 1894438), (13, 1602986), (14, 1488487), (22, 947219), (26, 801493), (49, 425282), (77, 270634), (91, 228998), (98, 212641), (143, 145726), (154, 135317), (182, 114499), (286, 72863), (539, 38662), (637, 32714), (1001, 20818), (1078, 19331), (1274, 16357), (1487, 14014), (2002, 10409), (2974, 7007)]