21018536

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{229}}^1$

素因数の和:402

約数の個数: 64

約数和(自身を含む): 49680000

約数和(自身を除く): 28661464

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 149, 154, 229, 298, 308, 458, 596, 616, 916, 1043, 1192, 1603, 1639, 1832, 2086, 2519, 3206, 3278, 4172, 5038, 6412, 6556, 8344, 10076, 11473, 12824, 13112, 17633, 20152, 22946, 34121, 35266, 45892, 68242, 70532, 91784, 136484, 141064, 238847, 272968, 375331, 477694, 750662, 955388, 1501324, 1910776, 2627317, 3002648, 5254634, 10509268, 21018536]

約数ペア:

[(1, 21018536), (2, 10509268), (4, 5254634), (7, 3002648), (8, 2627317), (11, 1910776), (14, 1501324), (22, 955388), (28, 750662), (44, 477694), (56, 375331), (77, 272968), (88, 238847), (149, 141064), (154, 136484), (229, 91784), (298, 70532), (308, 68242), (458, 45892), (596, 35266), (616, 34121), (916, 22946), (1043, 20152), (1192, 17633), (1603, 13112), (1639, 12824), (1832, 11473), (2086, 10076), (2519, 8344), (3206, 6556), (3278, 6412), (4172, 5038)]