21417025

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{313}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 33640704

約数和(自身を除く): 12223679

約数列:

[1, 5, 7, 17, 23, 25, 35, 85, 115, 119, 161, 175, 313, 391, 425, 575, 595, 805, 1565, 1955, 2191, 2737, 2975, 4025, 5321, 7199, 7825, 9775, 10955, 13685, 26605, 35995, 37247, 50393, 54775, 68425, 122383, 133025, 179975, 186235, 251965, 611915, 856681, 931175, 1259825, 3059575, 4283405, 21417025]

約数ペア:

[(1, 21417025), (5, 4283405), (7, 3059575), (17, 1259825), (23, 931175), (25, 856681), (35, 611915), (85, 251965), (115, 186235), (119, 179975), (161, 133025), (175, 122383), (313, 68425), (391, 54775), (425, 50393), (575, 37247), (595, 35995), (805, 26605), (1565, 13685), (1955, 10955), (2191, 9775), (2737, 7825), (2975, 7199), (4025, 5321)]