21489364

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{83}}^1\times {\mathrm{383}}^1$

素因数の和:496

約数の個数: 36

約数和(自身を含む): 41319936

約数和(自身を除く): 19830572

約数列:

[1, 2, 4, 13, 26, 52, 83, 166, 169, 332, 338, 383, 676, 766, 1079, 1532, 2158, 4316, 4979, 9958, 14027, 19916, 28054, 31789, 56108, 63578, 64727, 127156, 129454, 258908, 413257, 826514, 1653028, 5372341, 10744682, 21489364]

約数ペア:

[(1, 21489364), (2, 10744682), (4, 5372341), (13, 1653028), (26, 826514), (52, 413257), (83, 258908), (166, 129454), (169, 127156), (332, 64727), (338, 63578), (383, 56108), (676, 31789), (766, 28054), (1079, 19916), (1532, 14027), (2158, 9958), (4316, 4979)]