21049028

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{751}}^1$

素因数の和:793

約数の個数: 72

約数和(自身を含む): 50408064

約数和(自身を除く): 29359036

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 49, 52, 77, 91, 98, 143, 154, 182, 196, 286, 308, 364, 539, 572, 637, 751, 1001, 1078, 1274, 1502, 2002, 2156, 2548, 3004, 4004, 5257, 7007, 8261, 9763, 10514, 14014, 16522, 19526, 21028, 28028, 33044, 36799, 39052, 57827, 68341, 73598, 107393, 115654, 136682, 147196, 214786, 231308, 273364, 404789, 429572, 478387, 751751, 809578, 956774, 1503502, 1619156, 1913548, 3007004, 5262257, 10524514, 21049028]

約数ペア:

[(1, 21049028), (2, 10524514), (4, 5262257), (7, 3007004), (11, 1913548), (13, 1619156), (14, 1503502), (22, 956774), (26, 809578), (28, 751751), (44, 478387), (49, 429572), (52, 404789), (77, 273364), (91, 231308), (98, 214786), (143, 147196), (154, 136682), (182, 115654), (196, 107393), (286, 73598), (308, 68341), (364, 57827), (539, 39052), (572, 36799), (637, 33044), (751, 28028), (1001, 21028), (1078, 19526), (1274, 16522), (1502, 14014), (2002, 10514), (2156, 9763), (2548, 8261), (3004, 7007), (4004, 5257)]