20487280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{751}}^1$

素因数の和:806

約数の個数: 80

約数和(自身を含む): 53710848

約数和(自身を除く): 33223568

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, 751, 880, 1240, 1364, 1502, 1705, 2480, 2728, 3004, 3410, 3755, 5456, 6008, 6820, 7510, 8261, 12016, 13640, 15020, 16522, 23281, 27280, 30040, 33044, 41305, 46562, 60080, 66088, 82610, 93124, 116405, 132176, 165220, 186248, 232810, 256091, 330440, 372496, 465620, 512182, 660880, 931240, 1024364, 1280455, 1862480, 2048728, 2560910, 4097456, 5121820, 10243640, 20487280]

約数ペア:

[(1, 20487280), (2, 10243640), (4, 5121820), (5, 4097456), (8, 2560910), (10, 2048728), (11, 1862480), (16, 1280455), (20, 1024364), (22, 931240), (31, 660880), (40, 512182), (44, 465620), (55, 372496), (62, 330440), (80, 256091), (88, 232810), (110, 186248), (124, 165220), (155, 132176), (176, 116405), (220, 93124), (248, 82610), (310, 66088), (341, 60080), (440, 46562), (496, 41305), (620, 33044), (682, 30040), (751, 27280), (880, 23281), (1240, 16522), (1364, 15020), (1502, 13640), (1705, 12016), (2480, 8261), (2728, 7510), (3004, 6820), (3410, 6008), (3755, 5456)]