21647912

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{149}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 26736088

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 88, 104, 127, 143, 149, 254, 286, 298, 508, 572, 596, 1016, 1144, 1192, 1397, 1639, 1651, 1937, 2794, 3278, 3302, 3874, 5588, 6556, 6604, 7748, 11176, 13112, 13208, 15496, 18161, 18923, 21307, 36322, 37846, 42614, 72644, 75692, 85228, 145288, 151384, 170456, 208153, 245999, 416306, 491998, 832612, 983996, 1665224, 1967992, 2705989, 5411978, 10823956, 21647912]

約数ペア:

[(1, 21647912), (2, 10823956), (4, 5411978), (8, 2705989), (11, 1967992), (13, 1665224), (22, 983996), (26, 832612), (44, 491998), (52, 416306), (88, 245999), (104, 208153), (127, 170456), (143, 151384), (149, 145288), (254, 85228), (286, 75692), (298, 72644), (508, 42614), (572, 37846), (596, 36322), (1016, 21307), (1144, 18923), (1192, 18161), (1397, 15496), (1639, 13208), (1651, 13112), (1937, 11176), (2794, 7748), (3278, 6604), (3302, 6556), (3874, 5588)]