28347280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{281}}^1$

素因数の和:404

約数の個数: 80

約数和(自身を含む): 71964144

約数和(自身を除く): 43616864

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 97, 104, 130, 194, 208, 260, 281, 388, 485, 520, 562, 776, 970, 1040, 1124, 1261, 1405, 1552, 1940, 2248, 2522, 2810, 3653, 3880, 4496, 5044, 5620, 6305, 7306, 7760, 10088, 11240, 12610, 14612, 18265, 20176, 22480, 25220, 27257, 29224, 36530, 50440, 54514, 58448, 73060, 100880, 109028, 136285, 146120, 218056, 272570, 292240, 354341, 436112, 545140, 708682, 1090280, 1417364, 1771705, 2180560, 2834728, 3543410, 5669456, 7086820, 14173640, 28347280]

約数ペア:

[(1, 28347280), (2, 14173640), (4, 7086820), (5, 5669456), (8, 3543410), (10, 2834728), (13, 2180560), (16, 1771705), (20, 1417364), (26, 1090280), (40, 708682), (52, 545140), (65, 436112), (80, 354341), (97, 292240), (104, 272570), (130, 218056), (194, 146120), (208, 136285), (260, 109028), (281, 100880), (388, 73060), (485, 58448), (520, 54514), (562, 50440), (776, 36530), (970, 29224), (1040, 27257), (1124, 25220), (1261, 22480), (1405, 20176), (1552, 18265), (1940, 14612), (2248, 12610), (2522, 11240), (2810, 10088), (3653, 7760), (3880, 7306), (4496, 6305), (5044, 5620)]