28721985

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1\times {\mathrm{181}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 47174400

約数和(自身を除く): 18452415

約数列:

[1, 3, 5, 15, 71, 149, 181, 213, 355, 447, 543, 745, 905, 1065, 2235, 2715, 10579, 12851, 26969, 31737, 38553, 52895, 64255, 80907, 134845, 158685, 192765, 404535, 1914799, 5744397, 9573995, 28721985]

約数ペア:

[(1, 28721985), (3, 9573995), (5, 5744397), (15, 1914799), (71, 404535), (149, 192765), (181, 158685), (213, 134845), (355, 80907), (447, 64255), (543, 52895), (745, 38553), (905, 31737), (1065, 26969), (2235, 12851), (2715, 10579)]