21082761

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^2\times {\mathrm{103}}^1$

素因数の和:160

約数の個数: 60

約数和(自身を含む): 38356032

約数和(自身を除く): 17273271

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 103, 133, 171, 189, 309, 361, 399, 513, 567, 721, 927, 1083, 1197, 1539, 1957, 2163, 2527, 2781, 3249, 3591, 5871, 6489, 7581, 8343, 9747, 10773, 13699, 17613, 19467, 22743, 29241, 37183, 41097, 52839, 58401, 68229, 111549, 123291, 158517, 204687, 260281, 334647, 369873, 780843, 1003941, 1109619, 2342529, 3011823, 7027587, 21082761]

約数ペア:

[(1, 21082761), (3, 7027587), (7, 3011823), (9, 2342529), (19, 1109619), (21, 1003941), (27, 780843), (57, 369873), (63, 334647), (81, 260281), (103, 204687), (133, 158517), (171, 123291), (189, 111549), (309, 68229), (361, 58401), (399, 52839), (513, 41097), (567, 37183), (721, 29241), (927, 22743), (1083, 19467), (1197, 17613), (1539, 13699), (1957, 10773), (2163, 9747), (2527, 8343), (2781, 7581), (3249, 6489), (3591, 5871)]