21805784

素因数分解:

$2^3\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1$

素因数の和:433

約数の個数: 96

約数和(自身を含む): 56019600

約数和(自身を除く): 34213816

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 22, 26, 28, 44, 49, 52, 56, 77, 88, 91, 98, 104, 143, 154, 182, 196, 286, 308, 364, 389, 392, 539, 572, 616, 637, 728, 778, 1001, 1078, 1144, 1274, 1556, 2002, 2156, 2548, 2723, 3112, 4004, 4279, 4312, 5057, 5096, 5446, 7007, 8008, 8558, 10114, 10892, 14014, 17116, 19061, 20228, 21784, 28028, 29953, 34232, 35399, 38122, 40456, 55627, 56056, 59906, 70798, 76244, 111254, 119812, 141596, 152488, 209671, 222508, 239624, 247793, 283192, 389389, 419342, 445016, 495586, 778778, 838684, 991172, 1557556, 1677368, 1982344, 2725723, 3115112, 5451446, 10902892, 21805784]

約数ペア:

[(1, 21805784), (2, 10902892), (4, 5451446), (7, 3115112), (8, 2725723), (11, 1982344), (13, 1677368), (14, 1557556), (22, 991172), (26, 838684), (28, 778778), (44, 495586), (49, 445016), (52, 419342), (56, 389389), (77, 283192), (88, 247793), (91, 239624), (98, 222508), (104, 209671), (143, 152488), (154, 141596), (182, 119812), (196, 111254), (286, 76244), (308, 70798), (364, 59906), (389, 56056), (392, 55627), (539, 40456), (572, 38122), (616, 35399), (637, 34232), (728, 29953), (778, 28028), (1001, 21784), (1078, 20228), (1144, 19061), (1274, 17116), (1556, 14014), (2002, 10892), (2156, 10114), (2548, 8558), (2723, 8008), (3112, 7007), (4004, 5446), (4279, 5096), (4312, 5057)]