21309860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7451}}^1$

素因数の和:7484

約数の個数: 48

約数和(自身を含む): 52581312

約数和(自身を除く): 31271452

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7451, 14902, 29804, 37255, 74510, 81961, 96863, 149020, 163922, 193726, 327844, 387452, 409805, 484315, 819610, 968630, 1065493, 1639220, 1937260, 2130986, 4261972, 5327465, 10654930, 21309860]

約数ペア:

[(1, 21309860), (2, 10654930), (4, 5327465), (5, 4261972), (10, 2130986), (11, 1937260), (13, 1639220), (20, 1065493), (22, 968630), (26, 819610), (44, 484315), (52, 409805), (55, 387452), (65, 327844), (110, 193726), (130, 163922), (143, 149020), (220, 96863), (260, 81961), (286, 74510), (572, 37255), (715, 29804), (1430, 14902), (2860, 7451)]