19902555

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{151}}^1$

素因数の和:292

約数の個数: 48

約数和(自身を含む): 36279360

約数和(自身を除く): 16376805

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 101, 145, 151, 261, 303, 435, 453, 505, 755, 909, 1305, 1359, 1515, 2265, 2929, 4379, 4545, 6795, 8787, 13137, 14645, 15251, 21895, 26361, 39411, 43935, 45753, 65685, 76255, 131805, 137259, 197055, 228765, 442279, 686295, 1326837, 2211395, 3980511, 6634185, 19902555]

約数ペア:

[(1, 19902555), (3, 6634185), (5, 3980511), (9, 2211395), (15, 1326837), (29, 686295), (45, 442279), (87, 228765), (101, 197055), (145, 137259), (151, 131805), (261, 76255), (303, 65685), (435, 45753), (453, 43935), (505, 39411), (755, 26361), (909, 21895), (1305, 15251), (1359, 14645), (1515, 13137), (2265, 8787), (2929, 6795), (4379, 4545)]