19999497

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 33685632

約数和(自身を除く): 13686135

約数列:

[1, 3, 7, 17, 21, 49, 51, 53, 119, 147, 151, 159, 357, 371, 453, 833, 901, 1057, 1113, 2499, 2567, 2597, 2703, 3171, 6307, 7399, 7701, 7791, 8003, 17969, 18921, 22197, 24009, 44149, 53907, 56021, 125783, 132447, 136051, 168063, 377349, 392147, 408153, 952357, 1176441, 2857071, 6666499, 19999497]

約数ペア:

[(1, 19999497), (3, 6666499), (7, 2857071), (17, 1176441), (21, 952357), (49, 408153), (51, 392147), (53, 377349), (119, 168063), (147, 136051), (151, 132447), (159, 125783), (357, 56021), (371, 53907), (453, 44149), (833, 24009), (901, 22197), (1057, 18921), (1113, 17969), (2499, 8003), (2567, 7791), (2597, 7701), (2703, 7399), (3171, 6307)]