28052985

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:166

約数の個数: 64

約数和(自身を含む): 50282496

約数和(自身を除く): 22229511

約数列:

[1, 3, 5, 15, 23, 31, 43, 61, 69, 93, 115, 129, 155, 183, 215, 305, 345, 465, 645, 713, 915, 989, 1333, 1403, 1891, 2139, 2623, 2967, 3565, 3999, 4209, 4945, 5673, 6665, 7015, 7869, 9455, 10695, 13115, 14835, 19995, 21045, 28365, 30659, 39345, 43493, 60329, 81313, 91977, 130479, 153295, 180987, 217465, 243939, 301645, 406565, 459885, 652395, 904935, 1219695, 1870199, 5610597, 9350995, 28052985]

約数ペア:

[(1, 28052985), (3, 9350995), (5, 5610597), (15, 1870199), (23, 1219695), (31, 904935), (43, 652395), (61, 459885), (69, 406565), (93, 301645), (115, 243939), (129, 217465), (155, 180987), (183, 153295), (215, 130479), (305, 91977), (345, 81313), (465, 60329), (645, 43493), (713, 39345), (915, 30659), (989, 28365), (1333, 21045), (1403, 19995), (1891, 14835), (2139, 13115), (2623, 10695), (2967, 9455), (3565, 7869), (3999, 7015), (4209, 6665), (4945, 5673)]