21813428

素因数分解:

$2^2\times 7^3\times {\mathrm{13}}^1\times {\mathrm{1223}}^1$

素因数の和:1261

約数の個数: 48

約数和(自身を含む): 47980800

約数和(自身を除く): 26167372

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 91, 98, 182, 196, 343, 364, 637, 686, 1223, 1274, 1372, 2446, 2548, 4459, 4892, 8561, 8918, 15899, 17122, 17836, 31798, 34244, 59927, 63596, 111293, 119854, 222586, 239708, 419489, 445172, 779051, 838978, 1558102, 1677956, 3116204, 5453357, 10906714, 21813428]

約数ペア:

[(1, 21813428), (2, 10906714), (4, 5453357), (7, 3116204), (13, 1677956), (14, 1558102), (26, 838978), (28, 779051), (49, 445172), (52, 419489), (91, 239708), (98, 222586), (182, 119854), (196, 111293), (343, 63596), (364, 59927), (637, 34244), (686, 31798), (1223, 17836), (1274, 17122), (1372, 15899), (2446, 8918), (2548, 8561), (4459, 4892)]