291215375

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:273

約数の個数: 64

約数和(自身を含む): 425917440

約数和(自身を除く): 134702065

約数列:

[1, 5, 11, 19, 25, 55, 71, 95, 125, 157, 209, 275, 355, 475, 781, 785, 1045, 1349, 1375, 1727, 1775, 2375, 2983, 3905, 3925, 5225, 6745, 8635, 8875, 11147, 14839, 14915, 19525, 19625, 26125, 32813, 33725, 43175, 55735, 74195, 74575, 97625, 122617, 164065, 168625, 211793, 215875, 278675, 370975, 372875, 613085, 820325, 1058965, 1393375, 1854875, 2329723, 3065425, 4101625, 5294825, 11648615, 15327125, 26474125, 58243075, 291215375]

約数ペア:

[(1, 291215375), (5, 58243075), (11, 26474125), (19, 15327125), (25, 11648615), (55, 5294825), (71, 4101625), (95, 3065425), (125, 2329723), (157, 1854875), (209, 1393375), (275, 1058965), (355, 820325), (475, 613085), (781, 372875), (785, 370975), (1045, 278675), (1349, 215875), (1375, 211793), (1727, 168625), (1775, 164065), (2375, 122617), (2983, 97625), (3905, 74575), (3925, 74195), (5225, 55735), (6745, 43175), (8635, 33725), (8875, 32813), (11147, 26125), (14839, 19625), (14915, 19525)]