28123480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:449

約数の個数: 128

約数和(自身を含む): 82529280

約数和(自身を除く): 54405800

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 23, 28, 35, 40, 44, 46, 55, 56, 70, 77, 88, 92, 110, 115, 140, 154, 161, 184, 220, 230, 253, 280, 308, 322, 385, 397, 440, 460, 506, 616, 644, 770, 794, 805, 920, 1012, 1265, 1288, 1540, 1588, 1610, 1771, 1985, 2024, 2530, 2779, 3080, 3176, 3220, 3542, 3970, 4367, 5060, 5558, 6440, 7084, 7940, 8734, 8855, 9131, 10120, 11116, 13895, 14168, 15880, 17468, 17710, 18262, 21835, 22232, 27790, 30569, 34936, 35420, 36524, 43670, 45655, 55580, 61138, 63917, 70840, 73048, 87340, 91310, 100441, 111160, 122276, 127834, 152845, 174680, 182620, 200882, 244552, 255668, 305690, 319585, 365240, 401764, 502205, 511336, 611380, 639170, 703087, 803528, 1004410, 1222760, 1278340, 1406174, 2008820, 2556680, 2812348, 3515435, 4017640, 5624696, 7030870, 14061740, 28123480]

約数ペア:

[(1, 28123480), (2, 14061740), (4, 7030870), (5, 5624696), (7, 4017640), (8, 3515435), (10, 2812348), (11, 2556680), (14, 2008820), (20, 1406174), (22, 1278340), (23, 1222760), (28, 1004410), (35, 803528), (40, 703087), (44, 639170), (46, 611380), (55, 511336), (56, 502205), (70, 401764), (77, 365240), (88, 319585), (92, 305690), (110, 255668), (115, 244552), (140, 200882), (154, 182620), (161, 174680), (184, 152845), (220, 127834), (230, 122276), (253, 111160), (280, 100441), (308, 91310), (322, 87340), (385, 73048), (397, 70840), (440, 63917), (460, 61138), (506, 55580), (616, 45655), (644, 43670), (770, 36524), (794, 35420), (805, 34936), (920, 30569), (1012, 27790), (1265, 22232), (1288, 21835), (1540, 18262), (1588, 17710), (1610, 17468), (1771, 15880), (1985, 14168), (2024, 13895), (2530, 11116), (2779, 10120), (3080, 9131), (3176, 8855), (3220, 8734), (3542, 7940), (3970, 7084), (4367, 6440), (5060, 5558)]