21601899

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{179}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 36391680

約数和(自身を除く): 14789781

約数列:

[1, 3, 9, 11, 23, 33, 53, 69, 99, 159, 179, 207, 253, 477, 537, 583, 759, 1219, 1611, 1749, 1969, 2277, 3657, 4117, 5247, 5907, 9487, 10971, 12351, 13409, 17721, 28461, 37053, 40227, 45287, 85383, 104357, 120681, 135861, 218201, 313071, 407583, 654603, 939213, 1963809, 2400211, 7200633, 21601899]

約数ペア:

[(1, 21601899), (3, 7200633), (9, 2400211), (11, 1963809), (23, 939213), (33, 654603), (53, 407583), (69, 313071), (99, 218201), (159, 135861), (179, 120681), (207, 104357), (253, 85383), (477, 45287), (537, 40227), (583, 37053), (759, 28461), (1219, 17721), (1611, 13409), (1749, 12351), (1969, 10971), (2277, 9487), (3657, 5907), (4117, 5247)]