20791484

素因数分解:

$2^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 45122112

約数和(自身を除く): 24330628

約数列:

[1, 2, 4, 7, 14, 28, 37, 47, 49, 61, 74, 94, 98, 122, 148, 188, 196, 244, 259, 329, 427, 518, 658, 854, 1036, 1316, 1708, 1739, 1813, 2257, 2303, 2867, 2989, 3478, 3626, 4514, 4606, 5734, 5978, 6956, 7252, 9028, 9212, 11468, 11956, 12173, 15799, 20069, 24346, 31598, 40138, 48692, 63196, 80276, 85211, 106079, 110593, 140483, 170422, 212158, 221186, 280966, 340844, 424316, 442372, 561932, 742553, 1485106, 2970212, 5197871, 10395742, 20791484]

約数ペア:

[(1, 20791484), (2, 10395742), (4, 5197871), (7, 2970212), (14, 1485106), (28, 742553), (37, 561932), (47, 442372), (49, 424316), (61, 340844), (74, 280966), (94, 221186), (98, 212158), (122, 170422), (148, 140483), (188, 110593), (196, 106079), (244, 85211), (259, 80276), (329, 63196), (427, 48692), (518, 40138), (658, 31598), (854, 24346), (1036, 20069), (1316, 15799), (1708, 12173), (1739, 11956), (1813, 11468), (2257, 9212), (2303, 9028), (2867, 7252), (2989, 6956), (3478, 5978), (3626, 5734), (4514, 4606)]