21204465

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1471}}^1$

素因数の和:1541

約数の個数: 24

約数和(自身を含む): 35080704

約数和(自身を除く): 13876239

約数列:

[1, 3, 5, 15, 31, 93, 155, 465, 961, 1471, 2883, 4413, 4805, 7355, 14415, 22065, 45601, 136803, 228005, 684015, 1413631, 4240893, 7068155, 21204465]

約数ペア:

[(1, 21204465), (3, 7068155), (5, 4240893), (15, 1413631), (31, 684015), (93, 228005), (155, 136803), (465, 45601), (961, 22065), (1471, 14415), (2883, 7355), (4413, 4805)]