20498976

素因数分解:

$2^5\times 3^2\times {\mathrm{109}}^1\times {\mathrm{653}}^1$

素因数の和:778

約数の個数: 72

約数和(自身を含む): 58918860

約数和(自身を除く): 38419884

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 109, 144, 218, 288, 327, 436, 653, 654, 872, 981, 1306, 1308, 1744, 1959, 1962, 2612, 2616, 3488, 3918, 3924, 5224, 5232, 5877, 7836, 7848, 10448, 10464, 11754, 15672, 15696, 20896, 23508, 31344, 31392, 47016, 62688, 71177, 94032, 142354, 188064, 213531, 284708, 427062, 569416, 640593, 854124, 1138832, 1281186, 1708248, 2277664, 2562372, 3416496, 5124744, 6832992, 10249488, 20498976]

約数ペア:

[(1, 20498976), (2, 10249488), (3, 6832992), (4, 5124744), (6, 3416496), (8, 2562372), (9, 2277664), (12, 1708248), (16, 1281186), (18, 1138832), (24, 854124), (32, 640593), (36, 569416), (48, 427062), (72, 284708), (96, 213531), (109, 188064), (144, 142354), (218, 94032), (288, 71177), (327, 62688), (436, 47016), (653, 31392), (654, 31344), (872, 23508), (981, 20896), (1306, 15696), (1308, 15672), (1744, 11754), (1959, 10464), (1962, 10448), (2612, 7848), (2616, 7836), (3488, 5877), (3918, 5232), (3924, 5224)]