21978645

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{269}}^1\times {\mathrm{419}}^1$

素因数の和:709

約数の個数: 32

約数和(自身を含む): 38102400

約数和(自身を除く): 16123755

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 269, 419, 807, 1257, 1345, 2095, 3497, 4035, 5447, 6285, 10491, 16341, 17485, 27235, 52455, 81705, 112711, 338133, 563555, 1465243, 1690665, 4395729, 7326215, 21978645]

約数ペア:

[(1, 21978645), (3, 7326215), (5, 4395729), (13, 1690665), (15, 1465243), (39, 563555), (65, 338133), (195, 112711), (269, 81705), (419, 52455), (807, 27235), (1257, 17485), (1345, 16341), (2095, 10491), (3497, 6285), (4035, 5447)]