21151858

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:239

約数の個数: 64

約数和(自身を含む): 42319872

約数和(自身を除く): 21168014

約数列:

[1, 2, 7, 13, 14, 23, 26, 31, 46, 62, 91, 161, 163, 182, 217, 299, 322, 326, 403, 434, 598, 713, 806, 1141, 1426, 2093, 2119, 2282, 2821, 3749, 4186, 4238, 4991, 5053, 5642, 7498, 9269, 9982, 10106, 14833, 18538, 26243, 29666, 35371, 48737, 52486, 64883, 65689, 70742, 97474, 116219, 129766, 131378, 232438, 341159, 459823, 682318, 813533, 919646, 1510847, 1627066, 3021694, 10575929, 21151858]

約数ペア:

[(1, 21151858), (2, 10575929), (7, 3021694), (13, 1627066), (14, 1510847), (23, 919646), (26, 813533), (31, 682318), (46, 459823), (62, 341159), (91, 232438), (161, 131378), (163, 129766), (182, 116219), (217, 97474), (299, 70742), (322, 65689), (326, 64883), (403, 52486), (434, 48737), (598, 35371), (713, 29666), (806, 26243), (1141, 18538), (1426, 14833), (2093, 10106), (2119, 9982), (2282, 9269), (2821, 7498), (3749, 5642), (4186, 5053), (4238, 4991)]