21255468

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:303

約数の個数: 72

約数和(自身を含む): 55093248

約数和(自身を除く): 33837780

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 47, 52, 78, 94, 141, 156, 169, 188, 223, 282, 338, 446, 507, 564, 611, 669, 676, 892, 1014, 1222, 1338, 1833, 2028, 2444, 2676, 2899, 3666, 5798, 7332, 7943, 8697, 10481, 11596, 15886, 17394, 20962, 23829, 31443, 31772, 34788, 37687, 41924, 47658, 62886, 75374, 95316, 113061, 125772, 136253, 150748, 226122, 272506, 408759, 452244, 545012, 817518, 1635036, 1771289, 3542578, 5313867, 7085156, 10627734, 21255468]

約数ペア:

[(1, 21255468), (2, 10627734), (3, 7085156), (4, 5313867), (6, 3542578), (12, 1771289), (13, 1635036), (26, 817518), (39, 545012), (47, 452244), (52, 408759), (78, 272506), (94, 226122), (141, 150748), (156, 136253), (169, 125772), (188, 113061), (223, 95316), (282, 75374), (338, 62886), (446, 47658), (507, 41924), (564, 37687), (611, 34788), (669, 31772), (676, 31443), (892, 23829), (1014, 20962), (1222, 17394), (1338, 15886), (1833, 11596), (2028, 10481), (2444, 8697), (2676, 7943), (2899, 7332), (3666, 5798)]