257251905

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{131}}^1\times {\mathrm{151}}^1$

素因数の和:327

約数の個数: 72

約数和(自身を含む): 480452544

約数和(自身を除く): 223200639

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 131, 151, 153, 255, 289, 393, 453, 655, 755, 765, 867, 1179, 1359, 1445, 1965, 2227, 2265, 2567, 2601, 4335, 5895, 6681, 6795, 7701, 11135, 12835, 13005, 19781, 20043, 23103, 33405, 37859, 38505, 43639, 59343, 98905, 100215, 113577, 115515, 130917, 178029, 189295, 218195, 296715, 336277, 340731, 392751, 567885, 654585, 890145, 1008831, 1681385, 1703655, 1963755, 3026493, 5044155, 5716709, 15132465, 17150127, 28583545, 51450381, 85750635, 257251905]

約数ペア:

[(1, 257251905), (3, 85750635), (5, 51450381), (9, 28583545), (15, 17150127), (17, 15132465), (45, 5716709), (51, 5044155), (85, 3026493), (131, 1963755), (151, 1703655), (153, 1681385), (255, 1008831), (289, 890145), (393, 654585), (453, 567885), (655, 392751), (755, 340731), (765, 336277), (867, 296715), (1179, 218195), (1359, 189295), (1445, 178029), (1965, 130917), (2227, 115515), (2265, 113577), (2567, 100215), (2601, 98905), (4335, 59343), (5895, 43639), (6681, 38505), (6795, 37859), (7701, 33405), (11135, 23103), (12835, 20043), (13005, 19781)]