28840240

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2521}}^1$

素因数の和:2558

約数の個数: 80

約数和(自身を含む): 78807456

約数和(自身を除く): 49967216

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 40, 44, 52, 55, 65, 80, 88, 104, 110, 130, 143, 176, 208, 220, 260, 286, 440, 520, 572, 715, 880, 1040, 1144, 1430, 2288, 2521, 2860, 5042, 5720, 10084, 11440, 12605, 20168, 25210, 27731, 32773, 40336, 50420, 55462, 65546, 100840, 110924, 131092, 138655, 163865, 201680, 221848, 262184, 277310, 327730, 360503, 443696, 524368, 554620, 655460, 721006, 1109240, 1310920, 1442012, 1802515, 2218480, 2621840, 2884024, 3605030, 5768048, 7210060, 14420120, 28840240]

約数ペア:

[(1, 28840240), (2, 14420120), (4, 7210060), (5, 5768048), (8, 3605030), (10, 2884024), (11, 2621840), (13, 2218480), (16, 1802515), (20, 1442012), (22, 1310920), (26, 1109240), (40, 721006), (44, 655460), (52, 554620), (55, 524368), (65, 443696), (80, 360503), (88, 327730), (104, 277310), (110, 262184), (130, 221848), (143, 201680), (176, 163865), (208, 138655), (220, 131092), (260, 110924), (286, 100840), (440, 65546), (520, 55462), (572, 50420), (715, 40336), (880, 32773), (1040, 27731), (1144, 25210), (1430, 20168), (2288, 12605), (2521, 11440), (2860, 10084), (5042, 5720)]