20817368

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{587}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 47416320

約数和(自身を除く): 26598952

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 31, 44, 52, 62, 88, 104, 124, 143, 248, 286, 341, 403, 572, 587, 682, 806, 1144, 1174, 1364, 1612, 2348, 2728, 3224, 4433, 4696, 6457, 7631, 8866, 12914, 15262, 17732, 18197, 25828, 30524, 35464, 36394, 51656, 61048, 72788, 83941, 145576, 167882, 200167, 236561, 335764, 400334, 473122, 671528, 800668, 946244, 1601336, 1892488, 2602171, 5204342, 10408684, 20817368]

約数ペア:

[(1, 20817368), (2, 10408684), (4, 5204342), (8, 2602171), (11, 1892488), (13, 1601336), (22, 946244), (26, 800668), (31, 671528), (44, 473122), (52, 400334), (62, 335764), (88, 236561), (104, 200167), (124, 167882), (143, 145576), (248, 83941), (286, 72788), (341, 61048), (403, 51656), (572, 36394), (587, 35464), (682, 30524), (806, 25828), (1144, 18197), (1174, 17732), (1364, 15262), (1612, 12914), (2348, 8866), (2728, 7631), (3224, 6457), (4433, 4696)]