21680672

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:266

約数の個数: 72

約数和(自身を含む): 48882960

約数和(自身を除く): 27202288

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 32, 38, 52, 76, 104, 152, 169, 208, 211, 247, 304, 338, 416, 422, 494, 608, 676, 844, 988, 1352, 1688, 1976, 2704, 2743, 3211, 3376, 3952, 4009, 5408, 5486, 6422, 6752, 7904, 8018, 10972, 12844, 16036, 21944, 25688, 32072, 35659, 43888, 51376, 52117, 64144, 71318, 87776, 102752, 104234, 128288, 142636, 208468, 285272, 416936, 570544, 677521, 833872, 1141088, 1355042, 1667744, 2710084, 5420168, 10840336, 21680672]

約数ペア:

[(1, 21680672), (2, 10840336), (4, 5420168), (8, 2710084), (13, 1667744), (16, 1355042), (19, 1141088), (26, 833872), (32, 677521), (38, 570544), (52, 416936), (76, 285272), (104, 208468), (152, 142636), (169, 128288), (208, 104234), (211, 102752), (247, 87776), (304, 71318), (338, 64144), (416, 52117), (422, 51376), (494, 43888), (608, 35659), (676, 32072), (844, 25688), (988, 21944), (1352, 16036), (1688, 12844), (1976, 10972), (2704, 8018), (2743, 7904), (3211, 6752), (3376, 6422), (3952, 5486), (4009, 5408)]