21000929481

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{571}}^1\times {\mathrm{11447}}^1$

素因数の和:12051

約数の個数: 64

約数和(自身を含む): 37717954560

約数和(自身を除く): 16717025079

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 119, 153, 189, 357, 459, 571, 1071, 1713, 3213, 3997, 5139, 9707, 11447, 11991, 15417, 29121, 34341, 35973, 67949, 80129, 87363, 103023, 107919, 194599, 203847, 240387, 262089, 309069, 583797, 611541, 721161, 1362193, 1751391, 1834623, 2163483, 4086579, 5254173, 6536237, 12259737, 19608711, 36779211, 45753659, 58826133, 111116029, 137260977, 176478399, 333348087, 411782931, 777812203, 1000044261, 1235348793, 2333436609, 3000132783, 7000309827, 21000929481]

約数ペア:

[(1, 21000929481), (3, 7000309827), (7, 3000132783), (9, 2333436609), (17, 1235348793), (21, 1000044261), (27, 777812203), (51, 411782931), (63, 333348087), (119, 176478399), (153, 137260977), (189, 111116029), (357, 58826133), (459, 45753659), (571, 36779211), (1071, 19608711), (1713, 12259737), (3213, 6536237), (3997, 5254173), (5139, 4086579), (9707, 2163483), (11447, 1834623), (11991, 1751391), (15417, 1362193), (29121, 721161), (34341, 611541), (35973, 583797), (67949, 309069), (80129, 262089), (87363, 240387), (103023, 203847), (107919, 194599)]