28125680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1031}}^1$

素因数の和:1086

約数の個数: 80

約数和(自身を含む): 73709568

約数和(自身を除く): 45583888

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 40, 44, 55, 62, 80, 88, 110, 124, 155, 176, 220, 248, 310, 341, 440, 496, 620, 682, 880, 1031, 1240, 1364, 1705, 2062, 2480, 2728, 3410, 4124, 5155, 5456, 6820, 8248, 10310, 11341, 13640, 16496, 20620, 22682, 27280, 31961, 41240, 45364, 56705, 63922, 82480, 90728, 113410, 127844, 159805, 181456, 226820, 255688, 319610, 351571, 453640, 511376, 639220, 703142, 907280, 1278440, 1406284, 1757855, 2556880, 2812568, 3515710, 5625136, 7031420, 14062840, 28125680]

約数ペア:

[(1, 28125680), (2, 14062840), (4, 7031420), (5, 5625136), (8, 3515710), (10, 2812568), (11, 2556880), (16, 1757855), (20, 1406284), (22, 1278440), (31, 907280), (40, 703142), (44, 639220), (55, 511376), (62, 453640), (80, 351571), (88, 319610), (110, 255688), (124, 226820), (155, 181456), (176, 159805), (220, 127844), (248, 113410), (310, 90728), (341, 82480), (440, 63922), (496, 56705), (620, 45364), (682, 41240), (880, 31961), (1031, 27280), (1240, 22682), (1364, 20620), (1705, 16496), (2062, 13640), (2480, 11341), (2728, 10310), (3410, 8248), (4124, 6820), (5155, 5456)]