19992861

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{353}}^1$

素因数の和:426

約数の個数: 48

約数和(自身を含む): 35343360

約数和(自身を除く): 15350499

約数列:

[1, 3, 7, 9, 21, 29, 31, 63, 87, 93, 203, 217, 261, 279, 353, 609, 651, 899, 1059, 1827, 1953, 2471, 2697, 3177, 6293, 7413, 8091, 10237, 10943, 18879, 22239, 30711, 32829, 56637, 71659, 76601, 92133, 98487, 214977, 229803, 317347, 644931, 689409, 952041, 2221429, 2856123, 6664287, 19992861]

約数ペア:

[(1, 19992861), (3, 6664287), (7, 2856123), (9, 2221429), (21, 952041), (29, 689409), (31, 644931), (63, 317347), (87, 229803), (93, 214977), (203, 98487), (217, 92133), (261, 76601), (279, 71659), (353, 56637), (609, 32829), (651, 30711), (899, 22239), (1059, 18879), (1827, 10943), (1953, 10237), (2471, 8091), (2697, 7413), (3177, 6293)]