216778975

素因数分解:

$5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{239}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 317122560

約数和(自身を除く): 100343585

約数列:

[1, 5, 7, 25, 35, 71, 73, 175, 239, 355, 365, 497, 511, 1195, 1673, 1775, 1825, 2485, 2555, 5183, 5975, 8365, 12425, 12775, 16969, 17447, 25915, 36281, 41825, 84845, 87235, 118783, 122129, 129575, 181405, 424225, 436175, 593915, 610645, 907025, 1238737, 2969575, 3053225, 6193685, 8671159, 30968425, 43355795, 216778975]

約数ペア:

[(1, 216778975), (5, 43355795), (7, 30968425), (25, 8671159), (35, 6193685), (71, 3053225), (73, 2969575), (175, 1238737), (239, 907025), (355, 610645), (365, 593915), (497, 436175), (511, 424225), (1195, 181405), (1673, 129575), (1775, 122129), (1825, 118783), (2485, 87235), (2555, 84845), (5183, 41825), (5975, 36281), (8365, 25915), (12425, 17447), (12775, 16969)]